Fill in the blanks with an appropriate verb form. This grammar exercise tests your understanding of conditional verb forms.
In Type 1 conditional, we use a simple present tense in the if clause and will + infinitive in the main clause.
In Type 2 conditional, we use a simple past tense in the if clause and would + infinitive in the main clause.
In Type 3 conditional, we use a past perfect tense in the if clause and would have + past participle in the main clause.
1If you ............... mathematics at school, you wouldn't find statistics so difficult now.
Wrong!
The learning happened in the past (at school) but the result is in the present, so use the past perfect "had learnt" in the if-clause of this mixed conditional.
2If you learn a second language, you ............... better career prospects.
Wrong!
Use "will have" in the main clause of a first conditional sentence.
3I will help if she ............... politely.
Wrong!
Use the present simple third-person form "asks" after if in a first conditional sentence.
4The meeting will be postponed if the chairman ............... soon.
Wrong!
Use the present simple negative "doesn't get well" after if in a first conditional sentence.
5Unless you ............... my house, I will have you arrested.
Wrong!
Use the present simple "leave" after unless to express a real future condition.
6He would succeed if he ............... hard enough.
Wrong!
Use the past simple "tried" in the if-clause of a second conditional sentence.
7She would have been let off if she ...............
Wrong!
Use the past perfect "had apologized" in the if-clause of a third conditional sentence.
8The accident wouldn't have happened if the driver ............... careful.
Wrong!
Use the past perfect "had been" in the if-clause of a third conditional sentence.
9I would wait if I ............... time.
Wrong!
Use the past simple "had" in the if-clause of a second conditional sentence.
10I will visit Japan next month if I ............... the visa.
Wrong!
Use the present simple "get" after if in a first conditional sentence.
11You ............... better if you ate a little food.
Wrong!
Use "would feel" in the main clause of a second conditional sentence.
12If I ............... that she was in hospital, I would have gone to see her.
Wrong!
Use the past perfect "had known" in the if-clause of a third conditional sentence.
Exercise complete
0 out of 12
correct answers
Answers
- If you had learnt mathematics at school, you wouldn’t find statistics so difficult now.
- If you learn a second language, you will have better career prospects.
- I will help if she asks politely.
- The meeting will be postponed if the chairman doesn’t get well soon.
- Unless you leave my house, I will have you arrested.
- He would succeed if he tried hard enough.
- She would have been let off if she had apologized.
- The accident wouldn’t have happened if the driver had been careful.
- I would wait if I had time.
- I will visit Japan next month if I get the visa.
- You would feel better if you ate a little food.
- If I had known that she was in hospital, I would have gone to see her.

