Man writing in a notebook beside an open laptop at a bright desk
TOEIC Part 5 Grammar

TOEIC Trap: If Sentence Traps

In Part 5-style if-sentences, the key grammar decision is the relationship between the condition clause and the result clause.

Use nearby verb forms and time references as clues, then check which standard-English conditional pattern the sentence is using.

The condition-result relationship

Conditional sentences describe a condition and its result. The exact verb forms depend on whether the speaker presents the situation as real or possible, imagined, or contrary to a past fact.

This focused page practises the common patterns below. For a deeper treatment, continue to TOEIC Conditionals Part 2.

Standard-English pattern: check the condition clause, the result clause and the time reference together. A single word such as tomorrow or would is a clue, not an answer key by itself.

Real or possible future

If the shipment arrives, we will contact you.

Imagined present/future

If we had more time, we would revise the report.

Unreal past

If the report had arrived earlier, we would have reviewed it.

Real or possible future conditions

For the ordinary first-conditional pattern, the if-clause usually uses a present form and the result clause can use will or another modal with future meaning.

If the manager approves the request, we will begin the project.

If the shipment arrives today, the accounting team can process it tomorrow.

Important exception: do not turn this into “never use will after if.” English can use will in an if-clause for special meanings such as willingness. This page’s self-check uses the ordinary condition pattern, not those special uses.

Imagined situations

A common second-conditional pattern uses a past form in the if-clause and would in the result clause to present a present or future situation as imagined or unlikely.

If the budget were larger, we would hire another designer.

If the office were closer to the station, more employees would use public transport.

In formal hypothetical use, were is a standard choice with the verb be. Other forms can occur in broader English usage, so the whole sentence context still matters.

Unreal past conditions

A common third-conditional pattern uses past perfect in the if-clause and would have + past participle in the result clause to describe a past situation that did not happen.

If the documents had arrived earlier, we would have processed the order yesterday.

If the package had been delivered on Monday, we would have installed the equipment yesterday.

MTC checking order

Use signals as a starting point, then verify the complete clause relationship.

1. Find the result clause

Notice forms such as will, would and would have.

2. Check the time reference

Words such as tomorrow and yesterday help, but do not decide the answer alone.

3. Match the condition

Choose the if-clause form that fits the meaning and grammar of the whole sentence.

Quick TOEIC check

Choose the best answer. For this self-check, use the ordinary conditional patterns taught above; special willingness/refusal uses of will and mixed-condition interpretations are outside scope.

1. If the shipment ___ tomorrow, we will update the customer.
2. If the printer ___ properly, please call the IT department.
3. If the budget ___ larger, we would hire another designer.
4. If the report had been submitted earlier, we ___ the client yesterday.

Use signals, but verify the sentence

A fast first scan can be useful, but do not reduce conditionals to one-word triggers. Would, would have, tomorrow and yesterday are clues whose meaning depends on the full clause relationship.

MTC quick check: identify the result form, check the time reference, then match the condition. Treat this as a checking order, not a universal rule for every conditional sentence in English.

Continue with broader grammar practice

This page focuses on common if-sentence patterns. The MTC TOEIC Grammar Drills provide broader Part 5-style grammar practice across different sentence structures.

Continue with TOEIC Grammar Drills
FAQ – English (with answers) Q: Why is “If it will rain” wrong on TOEIC? A: TOEIC expects you to say “If it rains.” The word “if” already shows it’s about the future, so “will” is not used. Q: Can I say “If it will happen” in TOEIC writing? A: No. Say “If it happens.” TOEIC prefers the simple form after “if,” even for future ideas. Q: Why does TOEIC mark “If I would have known” as incorrect? A: TOEIC wants “If I had known.” The double “would have” structure is not accepted in formal English. Q: What is the right way to say “If I knew, I would…” on the test? A: That’s correct for an imaginary situation. TOEIC accepts “If I knew, I would help.” Q: Can I use “will” after “if” in any TOEIC sentence? A: Almost never. TOEIC expects you to use the simple form after “if,” not “will.” Q: I said “If he will call, I’ll answer.” Why is that wrong? A: TOEIC expects “If he calls, I’ll answer.” Just use present tense after “if.” Q: What’s wrong with “If I would know, I’d tell you”? A: TOEIC expects “If I knew, I’d tell you.” The correct form is “knew,” not “would know.” Q: Why do I see “If I had known…” on the TOEIC test? A: It shows something you regret from the past. TOEIC uses this to test precise sentence structure. Q: Can I use “If I will…” when talking about the future? A: Not after “if.” Just say “If I go,” “If I call,” etc. TOEIC sees “If I will…” as incorrect. Q: Is “If it rains, I will cancel” okay on the test? A: Yes. This is the expected TOEIC pattern — “if” + present tense, then “will.” Q: Why does TOEIC test if-sentences so much? A: Because many people use the wrong form when talking about the future or imaginary situations. It’s an easy trap. Q: How can I know if an if-sentence is wrong? A: Check if there’s a “will” right after “if.” If yes, it’s usually wrong. Q: I always say “If he would come.” Is that okay on TOEIC? A: TOEIC wants “If he came” or “If he had come.” “Would come” is not used after “if.” Q: Why is “If I had knew” wrong? A: “Knew” is past. TOEIC expects “had known” — the correct form for past regret. Q: Can I say “If you will be free, let me know”? A: For TOEIC, say “If you are free, let me know.” Keep it simple. Q: What’s the rule for if-sentences on TOEIC? A: Don’t think about rules. Think: “Does this sound like a formal sentence a manager would write?” Q: Why is “If I know it, I will help” okay, but “If I will know it” is not? A: Because TOEIC expects present tense after “if.” “Will know” sounds wrong in that spot. Q: When is “If I had” correct on the test? A: When talking about the past and what didn’t happen. Example: “If I had time, I would have joined.” Q: Why is “If I would’ve…” wrong even though I hear it a lot? A: Casual speech is different. TOEIC wants “If I had…” — especially in formal or business settings. Q: I always get confused by “if” sentences — how can I stop making mistakes? A: Focus on meaning. If it’s about the future, use present tense. If it’s about the past, use “had.” Don’t guess based on how it sounds.