Ответ:

2) Have you read this book?

  Yes, I have already read it.

  When did you read it?

  I've read it two month ago / I read it two month ago

3) Was it raining yet?

   Yes, it was raining two hours ago.

4) Have you ever seen Tom's bag?

   No, I didn't see it. I saw Tom on Friday, but not his bag.

5) Has he wrote anything about his summer plans? / Did he write anything about his summer plans?

6) You have already had dinner yet?

   Yes, we had dinner at 3 o'clock.