Underline the most suitable verb forms in each sentence. 1 Why didn’t you tell me? If you told / had told me, I had helped / would have helped you.

2 If Bill didn’t steal / hadn’t stolen the money, he wasn’t / wouldn’t be / hadn’t been in prison now.

3 If Ann wasn’t driving/ didn’t drive / hadn’t driven so fast, her car didn’t crash / wouldn’t crash / wouldn’t have crashed into a tree.

4 Let me give you some advice. If you smoked / would smoke / had smoked less, you didn’t feel / wouldn’t feel / wouldn’t have felt so tired.

5 What bad luck! If Alan didn’t fall / hadn’t fallen / wouldn’t fall over, he won / would win / would have won the race.​

1. Why didn't you tell me? If you had told me, I would have helped you.

Explanation: In this sentence, we are talking about a past unreal condition. The action of not telling me happened in the past, so we use the past perfect verb form "had told". The result of not telling me is that I didn't help in the past, so we use the past perfect verb form "would have helped".

2. If Bill hadn't stolen the money, he wouldn't be in prison now.

Explanation: Here, we are talking about a past unreal condition. The action of stealing the money happened in the past, so we use the past perfect verb form "hadn't stolen". The result of not stealing the money is that he is not in prison now, so we use the present conditional verb form "wouldn't be".

3. If Ann hadn't driven so fast, her car wouldn't have crashed into a tree.

Explanation: This sentence again discusses a past unreal condition. The action of driving fast happened in the past, so we use the past perfect verb form "hadn't driven". The result of not driving fast is that her car didn't crash into a tree in the past, so we use the past perfect verb form "wouldn't have crashed".

4. Let me give you some advice. If you smoked less, you wouldn't feel so tired.

Explanation: In this sentence, we are talking about a general condition. The action of smoking less refers to a habitual action, so we use the simple past verb form "smoked". The result of smoking less is that in general, you wouldn't feel so tired, so we use the present conditional verb form "wouldn't feel".

5. What bad luck! If Alan hadn't fallen over, he would have won the race.

Explanation: Here, we are talking about a past unreal condition. The action of falling over happened in the past, so we use the past perfect verb form "hadn't fallen". The result of not falling over is that he didn't win the race in the past, so we use the past perfect verb form "would have won".