Используйте правильные формы глаголов чтобы предложения были правильными.

1. If he (miss) … the last bus! All alone in the unfamiliar town he felt very uncomfortable.

2. If you (not, play) ... compute games for hours, you (have)… more time for your lessons. I believe you should think about it.

3. I don't know the answer. If only I (know) … what to say!