Select correct verbs. If you hotel reception during your stay last week, we discounted tickets to the aquarium today.

had not contacted, would not have

Conditional Subjunctive: correct answers

What the Conditional Subjunctive Actually Does

In everyday English, we use the conditional subjunctive to talk about situations that are unreal, hypothetical, or contrary to fact. It shows up most often after "if" and after verbs/expressions like "wish," "as if," and "it's time." The key pattern that surprises learners: where you'd normally expect "was," the conditional subjunctive uses "were" — for every subject, including I, he, she, and it.

This isn't old-fashioned or overly formal. Native speakers use it constantly in sentences like "If I were you…" The subjunctive signals that you're not describing reality — you're imagining an alternative.

The Core Pattern

The structure you need to internalize is:

If + subject + were … , subject + would/could/might + base verb

✅ If she were taller, she would play basketball. ❌ If she was taller, she would play basketball.

Both versions are widely heard in casual speech, and some grammar books now accept "was" in informal contexts. But in writing, on exams, and in careful speech, "were" is the expected form. It's the version that will never be marked wrong.

Here's another example — this time with "I":

✅ If I were rich, I would travel around the world. ❌ If I would be rich, I would travel around the world.

Notice the second error there: putting "would" in the if-clause. That's a separate but extremely common mistake (more on it below).

Beyond "If" — Where Else It Appears

The conditional subjunctive isn't limited to if-clauses. Watch for these triggers:

Wish:

✅ I wish I were better at cooking. ❌ I wish I was better at cooking.

As if / as though:

✅ He talks as if he were the boss.

It's (high) time:

✅ It's time we were leaving.

In each case, the speaker is describing something contrary to present reality. That's the trigger — not the word "if" itself, but the idea of unreality.

The Mistake That Costs the Most Points

The single most common error B1–B2 learners make with conditional subjunctive sentences is putting "would" in the if-clause:

❌ If I would have more time, I would learn Japanese. ✅ If I had more time, I would learn Japanese.

This happens because in many other languages, both clauses use a conditional verb form. In English, the if-clause takes the past subjunctive (were, had, knew, etc.), and only the result clause gets "would."

A quick self-check: scan your if-clause. If you see "would" sitting right after "if," remove it and use a simple past or "were" form instead.

When "Was" Is Actually Fine

Here's the edge case. If the if-clause describes something that might actually be true — something you're uncertain about rather than imagining — use the normal indicative ("was"), not the subjunctive:

✅ If she was at the party last night, I didn't see her.

This sentence doesn't imagine an unreal situation. The speaker genuinely doesn't know whether she was there. Compare:

✅ If she were at the party right now, she would be dancing.

This one is clearly hypothetical — she's not at the party. That's why "were" is correct.

The distinction boils down to one question: Am I imagining something unreal, or am I talking about something that might be or might have been true? Unreal → subjunctive "were." Possibly real → normal past tense.

Keep that test in mind and the conditional subjunctive stops being mysterious. It's just English's way of saying: this isn't real, but let's think about it anyway.

Hard C1 | AdvancedC1 Subjunctive mood Indicative mood Conditional sentence Verb tense Modal verb Auxiliary verb

Correct answers

Question 1

Select the correct verb.

Gary _________________________ take a taxi to the museum if Kevin doesn't pick him up in the car.

Gary will take a taxi to the museum if Kevin doesn't pick him up in the car.

A 1st conditional sentence with will + simple infinitive in the main clause, and if + simple present in the conditional.

Question 2

Select the correct verb.

I _________________________ late tomorrow if I don't set my alarm tonight.

I will be late tomorrow if I don't set my alarm tonight.

A 1st conditional sentence (real condition) with will + simple infinitive (will be) in the main clause, and if + simple present in the conditional.

Question 3

Select correct verb.

Had they cast their nets wider, they ____________________________ a lot more fish.

This is a 3rd conditional, it refers to an unreal condition in the past (if they had cast their nets wider). If is omitted, and had is moved to the start of the sentence, before the subject of the if-clause. If + past perfect / auxiliary modal verb + have + past participle. (would have caught)

Question 4

Select correct verbs.

Should the tiger get out of the enclosure, please run as fast as you can.

Should the tiger get out of the enclosure, please run as fast as you can.

First conditional with should. If is omitted here, and should is moved to the beginning. It denotes a very unlikely future outcome. (If the tiger gets out, you must run as fast as you can.)

Should the tiger get out of the enclosure, please run as fast as you can.

Main sentence verb is a polite imperative - Please RUN! (If the tiger gets out, you will run as fast as you can.)

Question 5

Select correct verb.

The feisty stallion _________________________ a lot happier if he had a large field to run around in.

This is a 2nd conditional, there is a possibility of the condition becoming reality. Use would to indicate a slightly uncertain, but possible outcome. If + simple past / auxiliary modal verb (could/should/might/may/would etc.) + simple infinitive (would be)

Question 6

Select correct verbs.

If you had not contacted hotel reception during your stay last week, we would not have discounted tickets to the aquarium today.

If you had not contacted hotel reception during your stay last week, we would not have discounted tickets to the aquarium today.

This is a 3 type, negative conditional indicating a positive outcome (you did contact reception). Use if + past perfect (had contacted) to indicate an unreal condition in the past.

If you had not contacted hotel reception during your stay last week, we would not have discounted tickets to the aquarium today.

In 3rd type conditional, use would have + past participle in the main clause.

Question 7

Select correct verb.

If I were a mechanic, I _________________________ such problems with my car.

The use of were in the conditional indicates that I am not a mechanic, so this is an unreal condition with were. This means that the main clause takes would + simple infinitive (would have). In informal English, the form If I was a mechanic is also acceptable.

Question 8

Select correct verbs.

If Paula could go back in time, she wouldask Boris to marry her.

If Paula could go back in time, she would ask Boris to marry her.

Could is often used in sentences with unreal conditions: going back in time is impossible.

If Paula could go back in time, she would ask Boris to marry her.

would + simple infinitive is used as the outcome is completely unrealistic.

If Paula could go back in time, she would ask Boris to marry her.

The main clause in the second type conditional is formed by would + simple infinitive, in this case ask

Question 9

Select correct verbs.

If you paint the building a very bright yellow, people will find it easily.

If you paint the building a bright yellow, people will find it easily.

First conditional as it has a real condition. Use If + simple present (paint)

If you paint the building a bright yellow, people will find it easily.

First conditional with a very likely outcome: use the simple future (will + simple infinitive - will find).

Question 10

Select correct verb.

If I _________________________ a lot of money, I would buy a mansion in Hollywood.

This is an example of the 2nd conditional where the if-clause could still happen, so we use If + simple past (had) / auxiliary modal verb (could/should/might/may) + simple infinitive (would buy)

Question 11

Select the correct verb.

If you would bring the flowers to the party, then I _________________________ the cake.

If you would bring the flowers to the party, then I will bring the cake.

A 1st conditional sentence with if + would + verb to indicate a polite request. Use will + verb for the main clause.

Question 12

Select correct verb.

His parents _________________________ their retirement if only they stopped working.

An example of could in a conditional - It refers to an unreal condition (they haven't stopped working). Use could + present tense / simple past in conditional clause.

Question 13

Select correct verb.

Caroline _________________________ carrots a lot faster if her knife was sharper.

This is an example of a 2nd conditional with would: An auxiliary modal verb (could/should/might/may/would) + simple infinitive (would cut) in the main clause, If + simple past in the conditional clause.

Question 14

Select correct verb.

A fox might eat the chickens if the gate _________________________ open.

2nd condition, created with might to indicate an unreal scenario (it is very unlikely). Were is used for all persons in this type of if-clause. In informal speech, you can use if the gate was open.

Question 15

Select correct verb.

If I had brought a towel, I ___________________________ the dog before allowing him in the car!

This is a 3rd conditional, referring to an unreal condition in the past. I did not bring a towel, and this is not going to change. You use if + past perfect (had brought), and would + have + past participle (would have dried) in the main clause.

Question 16

Select correct verbs.

Olivia might _________________________ to the zoo tomorrow if the weather _________________________ nice

Olivia might go to the zoo tomorrow if the weather is nice.

First conditional with might. Use might + simple infinitive to indicate a remote possible outcome (It is likely Olivia will decide not to go, even if the weather is nice).

Olivia might go to the zoo tomorrow if the weather is nice.

The first conditional is formed by if + simple present verb, in this case is

Question 17

Select correct verb.

Another day starts when the sun _________________________ tomorrow.

Although if is implied (if the sun rises), this is a zero conditional as it is always true. You use simple present in both main and conditional clause.

Question 18

Select the correct verb.

If we _________________________ in 2 minutes, we could be there at 3 o'clock.

If we leave now, we could be there at 3 o'clock.

The outcome is very possible, so it's 1st conditional. Formed by: If + simple present / simple future (will + simple infinitive. Here could can be replaced by many auxiliary modal verbs (will/would/can/could/should/may/might) to indicate how likely it is that they'll get there by 3 o'clock. (will=very likely -- might=unlikely)

Question 19

Select correct verb.

Should the food _________________________ cold before you are home, you can heat it up in the microwave.

Should in an if-clause: If is omitted here, and should is moved to the beginning before the subject. It denotes an unlikely future outcome - compare the above with If the food gets cold before you are home, you can heat it up in the microwave. If + should + simple present verb / simple present in main sentence.

Question 20

Select correct verb.

We __________________________ to the airport to pick him up if he had not been delayed.

This is a 3rd conditional, referring to an unreal condition in the past. You use would + have + past participle (would have gone) in the main clause, and if + past perfect (he had been delayed) for the conditional.