Придумать два предложения second conditional sentences.
два предложения third conditional sentences.
без сложных конструкций, элементарные.

Second Conditional

1. If I were you, I wouldn't try to cheat.

2. I would tell you the answer if I knew it.

Third Conditional

1. If you had left home earlier, you wouldn't have been late.

2. If mum had reminded me to buy some milk, I would have done it.