Помогите поставить глаголы в правильную форму : 1) When I was in Great Britain, I often (understand) what English people were saying. 2) I know Bob(understand) my question yesterday. 3) They don't(understand) italian. 4) Do you...

Помогите поставить глаголы в правильную форму : 1) When I was in Great Britain, I often (understand) what English people were saying. 2) I know Bob(understand) my question yesterday. 3) They don't(understand) italian. 4) Do you think Tom(understand) what he is doing? Tanya spoke some English and she(understand) a lot.