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- you (know) Ken?
-Ken?
- you (see) that boy over there?
- Which boy?
- He (play) tennis with Helen now.
- Oh, I (not know) him.
- His name is Ken. He (play) tennis here every Sunday. He(be) very good at it. I (want) to play a game with him.

-Do you know Ken?

-Ken?

-Do you see that boy over there?

-Which boy?

-He is playing tennis with Helen now.

-Oh, I don`t know him.

-His name is Ken. He plays tennis here every Sunday. He is very good at it. I want to play a game with him.