1. This morning I saw him ________ (do) his homework for some time and then play basketball.

2. When I was on my way to school this morning, I saw two thieves _________ (run) out of the bank.

3. I often see the boys _________ (play) football on the playground.

4. I saw him _________ (walk) into the building at that time.

5．When I was on my way to school this morning, I saw two women_________(quarrel).

6．The water is very clean. You can see fish __________ (swim) in it.

7. Did you see somebody _______ into the room? (steal)

8. I saw him _____________ in the room at that time. (read)

9．I often see her ____ in the park.  (run）

10.  This morning I saw him _____ (do) his homework when I went into his room.

二．把下列句子改为被动语态 
1.  I saw the boy run in the park yesterday.