Grammar · Lesson 10

Zero conditional when one situation regularly produces another

Explain a dependable pattern, not a single prediction: If the card reader flashes red, the door stays locked. When a customer changes the date, the system sends a new confirmation.

50–60 min coreif / when + present · presentroutines · systems · repeated results15–20 min listening and retrieval

NoticeFind the repeated condition and the result that normally follows.

DiscoverConnect meaning to present-simple form in both clauses.

ContrastSeparate a general pattern from one open future situation.

UseExplain a real or invented process and answer follow-up questions.

Can-do: By the end, you can explain repeated cause-and-result relationships, routines, system behavior, and standing procedures; form affirmative and negative Zero Conditionals; choose if or when from the intended meaning; order and punctuate both clauses; avoid presenting a limited pattern as a universal truth; and contrast a general Zero Conditional with a single open First Conditional.

Two-minute retrieval

Three foundations from A1

Use the subject, frequency expression, and sentence purpose.

1The singular subject system takes third-person present agreement: The system a confirmation.

2The sentence describes a repeated routine, not one finished event: The support team replies within an hour.

3Give the user a direct instruction with a base verb: the blue button.

Notice a system that behaves the same way each time

Harbor Workspace access guide

Normal entry: When a member scans an active card, the door unlocks.

Expired card: If a card is expired, the reader flashes red.

Missing reservation: If the system does not find a reservation, it sends the member to reception.

Reception routine: When reception verifies the booking, the member receives a temporary pass.

Important limit: These sentences describe the documented behavior of this workspace system. They do not state universal facts about every access system.

Does each sentence describe one event tomorrow, or what regularly happens in a stated situation?
Which clause states the condition? Which clause states its regular result?
What tense appears in both clauses?

Discovery check: read the relationship

1When a member scans an active card names the situation that activates the rest of the sentence, so it is the .

2The door unlocks states what normally follows that scan, so it is the .

3The verbs scans and unlocks are both in the .

4The guide treats every normal active-card scan as part of the expected process, so when introduces an .

5An expired card may or may not appear, so if introduces a .

6The guide can support claims about , not every door and card reader in the world.

Get to the root: a reusable relationship

The name Zero Conditional is a teaching label, not a special verb tense. It describes a relationship the speaker presents as regular, dependable, or repeatedly observable. One situation creates the condition; another situation follows as its normal result.

relationship	condition	regular result
system behavior	if the card is expired	the reader flashes red
work routine	when a client changes the date	we send a new confirmation
personal pattern	if I skip lunch	I get tired in the afternoon
rule or policy	if a payment arrives late	the account shows a late fee

Accuracy matters: Grammar does not prove that a relationship is scientifically universal. If I skip lunch, I get tired reports a personal pattern. If this reader detects an expired card, it flashes red reports documented system behavior. The context defines how broad the claim is.

Build the core form

The most useful core pattern uses the Present Simple in both clauses. Each verb agrees with its own subject.

order	form and punctuation	example
condition first	If / When + present, present; add a comma after the first clause	If the card expires, the reader flashes red.
result first	Present + if / when + present; normally no comma in this short pattern	The reader flashes red if the card expires.
negative condition	if + do / does not + base	If the system does not find a booking, it sends an alert.
negative result	present negative in the result clause	The door does not unlock if the card is inactive.

Do not add will simply because the result happens after the condition. The Zero Conditional presents the complete relationship as a standing pattern: If the card is inactive, the door stays locked.

Drill 1: complete the repeated pattern

1The member is singular, so the condition needs present agreement: When a member an active card, the door unlocks.

2The door is also singular, so its regular result uses .

3The negative condition needs doesn’t + base verb: If the system a reservation, it sends an alert.

4The singular system takes present agreement in the result: It an alert if it does not find a reservation.

5The condition uses be in its present form for singular card: If a card expired, the reader flashes red.

6The negative system result is a regular present pattern: The door locked if the card is inactive.

Choose if or when from the intended meaning

In repeated relationships, both words can be possible, but they focus attention differently.

marker	usual focus	example
when	the event is an expected stage of the routine; think “every time this happens”	When reception verifies a booking, the member receives a pass.
if	focus on the cases in which a condition is true; the case may not occur every time	If a card is expired, the reader flashes red.

When does not make a statement more factual by itself, and if does not automatically mean “unlikely.” The surrounding situation and the speaker’s purpose determine the interpretation.

Drill 2: frame the repeated situation

1Verification is a normal stage for every valid booking: reception verifies a booking, the member receives a pass.

2Only some cards are expired: a card is expired, the reader flashes red.

3A confirmation is a standard stage after every completed date change: The system sends a new confirmation a customer changes the date.

4The guide describes the exception in which the screen has no connection: The app shows an offline message the screen has no connection.

5In this guide, when helps the reader follow .

6In this guide, if directs attention to the condition.

Zero or First Conditional? Ask what time relationship the speaker means

speaker’s meaning	typical pattern	example
general, repeated, or standing relationship	if + present, present	If the reader detects an expired card, it flashes red.
one open future condition and its response	if + present, will + base	If the reader flashes red tonight, I’ll call support.

The condition clause can look similar because both patterns commonly use a present form after if. The result clause and time context reveal the difference. Compare If clients change the date, we send a new confirmation, a standing procedure, with If Maya changes the date tomorrow, I’ll send a new confirmation, one open future response.

Drill 3: choose the time relationship

1The manual describes the reader’s normal behavior: If a card is inactive, the door locked.

2The team is discussing tonight’s one unresolved access problem: If this card is still inactive tonight, the door locked.

3This is the company’s standing procedure: If clients change a booking date, we a new confirmation.

4Maya may change tomorrow’s booking, and you state your response: If Maya changes the date tomorrow, I a new confirmation.

5This is your recurring personal experience: If I skip lunch, I tired in the afternoon.

6Tomorrow may be unusually busy, and you predict one consequence: If I skip lunch tomorrow, I tired in the afternoon.

Sound natural: make the condition and result easy to hear

Say the sentence in two connected thought groups, with a small boundary between the condition and its result: If the card is exPIRED | the reader flashes RED. Stress the key condition and the new result, not every word.

In connected U.S. speech, if the often links smoothly as /ɪf ðə/, and unstressed the stays light. When the result comes first, keep the sentence moving into the final condition: The reader flashes RED if the card is exPIRED. Use stronger contrastive stress only to repair a detail: It flashes RED, not orange.

Read a troubleshooting guide carefully

Desk 14 video-call setup

When a user signs in, the screen checks the camera and microphone. If the camera is unavailable, the camera icon turns orange. If another application controls the microphone, the sound test does not begin. When both tests finish successfully, the Join button becomes active. These are the normal results on Desk 14 with software version 6.2. Tomorrow the support team will install version 6.3. If the new version produces a different result, the team will update this guide.

Reading check: use only the guide

1. What normally happens when a user signs in?

2. What is the normal result if the camera is unavailable?

3. Which condition prevents the sound test from beginning?

4. How broad is the evidence for these normal results?

5. Why does the final sentence use will update?

Build two complete relationships

Drill 4: build the system pattern

State what the documented screen normally does with an unavailable camera.

Drill 5: put the result first

State the normal result, then its expected repeated condition.

Repair meaning and form

Drill 6: standing result or future response?

The manual says: If the card is expired, the reader will flash red. Tap the word that creates the wrong time framing for this standing procedure.

Drill 7: result-clause agreement

The guide says: When a member scans an active card, the door unlock. Tap the verb with the wrong form.

Drill 8: control the scope of the claim

The guide supports only Desk 14 with version 6.2: If a camera is unavailable, every video system shows an orange icon. Tap the word that creates the unsupported universal claim.

Oral transforms: keep or change the time relationship

Say the complete sentence before revealing it. Preserve the stated meaning.

1 The reader flashes red if the card is expired. Put the condition first.

If the card is expired, the reader flashes red.

2 When a member scans an active card, the door unlocks. Put the result first.

The door unlocks when a member scans an active card.

3 If the system finds a booking, it displays the reservation. Make the condition negative.

If the system does not find a booking, it displays an error message.

4 If clients change the date, we send a new confirmation. Make it one open case tomorrow.

If the client changes the date tomorrow, we will send a new confirmation.

5 If the reader flashes red tonight, I will call support. Make it the team’s standing procedure.

If the reader flashes red, we call support.

6 An active card scan is a normal stage. Use when and state the result.

When a member scans an active card, the door unlocks.

Hear the relationship in natural U.S. speech

In a short condition-first sentence, speakers often make two thought groups: If the CARD is expired, / the reader flashes RED. The comma marks the clause boundary in writing; a small pause can mark it in speech. Important content words carry stress. Function words such as if, the, a are usually lighter.

Do not reduce the third-person ending away. Scans, unlocks, flashes, sends still need their final agreement sound. In result-first order, the sentence may flow as one thought group: The door stays LOCKED if the card is inACTIVE.

Tutor-read listening

General pattern or one future case?

5 clips

Look away from the text. The tutor reads each clip once naturally and once more if needed. Decide whether it describes a repeated relationship or one open future response.

1. What relationship does Clip 1 describe?

2. What relationship does Clip 2 describe?

3. What normally happens in Clip 3?

4. Which condition causes the alert in Clip 4?

5. How broad is the claim in Clip 5?

Play and practice

Games and a short reading that recycle this lesson. Use them as a warm-up, a fast finisher, or homework. Each one checks itself.

Read

How the Sunny Wash machines work

Read once for meaning. Then read again and do the tasks below.

Laundromat guide115 wordsAbout 1 min

Welcome to Sunny Wash! Please read this guide before your first wash. When you put a card in a washer, the screen shows your balance. If your balance is under $3, the machine asks you to add money. When you press Start, the door locks.

If someone opens a dryer during a cycle, the dryer stops right away. When a wash finishes, the machine beeps three times. If you leave clothes in a machine for more than 30 minutes, an employee moves them to a basket.

These rules are true for the Sunny Wash machines only. Next month, the owner will install new machines. If the new machines work differently, we will update this guide.

Find it

Tap the 6 present simple verbs that state a regular result. Skip the verbs after if and when, and skip the last paragraph.

Check your understanding

1. What happens when a wash finishes?

2. What happens if someone opens a dryer during a cycle?

3. Why does the last sentence use will update?

Crossword

Regular results

Click a clue or a square, then type. Press Check when you finish.

Across

Down

Sort it

Regular pattern or one future case?

Tap a word, then tap the box it belongs in. Press Check when the tray is empty.

Match up

Condition and regular result

Tap an item on the left, then its partner on the right.

Condition

Regular result

Communicate: explain a process someone can use

Choose one route: explain a real process you know well, or invent a fictional process so you do not have to share private information. Possible topics include joining a video call, handling a customer request, opening or closing a workplace, using a device, preparing a familiar meal, or managing a personal routine.

Process specialist and new user

Specialist: Give a short overview, then explain at least four condition-result relationships. Include one expected stage with when, one possible case with if, one negative condition, and one result-first sentence. State the limits of your knowledge. If one result concerns only tomorrow or another single future case, use a First Conditional and explain why.

New user: Ask follow-up questions: What happens if...? Does that happen every time? What do I do when...? Is that true for every version? What will happen if it changes tomorrow?

Switch roles: The second specialist explains a different process. The listener challenges one sentence that sounds too broad or has an unclear time relationship.

Success check: Use present-simple agreement in both clauses, express a clear repeated meaning, choose if or when purposefully, keep the Zero-versus-First contrast accurate, and respect the evidence limits.

Write the quick guide

Write 90–120 words for a new user. Include four Zero Conditionals, one condition-first sentence, one result-first sentence, one negative condition, and one limited claim such as In this version... or For my normal routine.... Add one First Conditional only if you describe a genuinely open future case.

Final check

1. What is the central meaning of the Zero Conditional?

2. Which sentence accurately states the standing system behavior?

3. Why is when useful in “When reception verifies a booking, the member receives a pass”?

4. Which result-first sentence has accurate form and punctuation?

5. Which sentence describes one open future response rather than a standing pattern?

6. What prevents a Zero Conditional from becoming an unsupported universal claim?

Reflect and retrieve

Complete these ideas aloud: A Zero Conditional connects... Both clauses usually use... When is useful when... If is useful when... A result-first sentence... A Zero Conditional differs from a First Conditional because... The evidence limit matters because...

Next use: Before the next lesson, notice one repeated process in your work, home, or technology. Write two accurate Zero Conditionals about it and one First Conditional about a possible change tomorrow. Be ready to explain why each time relationship is different.

Return tomorrow before rereading. Complete the five-minute next-day retrieval, then revisit only the repeated meaning, present form, marker choice, scope limit, or future contrast that still feels slow.

Next-day retrieval

Five checks without rereading the lesson

1. What two meanings does a Zero Conditional connect?

2. Which sentence has accurate negative condition form?

3. Which marker best presents successful test completion as an expected stage: if or when?

4. How can you keep a general pattern responsibly limited?

5. What is the useful contrast between these two conditional patterns?