Exercise 1. Underline the correct form of the verb. 1. I watched them (to play / playing / play) football for an hour. 2. Did you see him (to leave / leaving / leave) the building? 3. She noticed her cat (to sleep / sleeping / sleep) on the table. 4. We let the children (sing/ singing / to sing) in the garden. 5. They heard the dog (to bark / barking / bark) during the earthquake. Exercise 2. Fill in the blank with the correct form of the verb. 1. I want you _______ (finish) your homework before dinner. 2. They didn't expect us _______ (arrive) so early. 3. Let me _______ (help) you with that heavy box. 4. She wants her children _______ (learn) a musical instrument. 5. The teacher made the students _______ (redo) the exercise. Exercise 3. Make up sentences. 1. saw / him / I / the / crossing/street. 2. the /me / Let/help/carry / you / bags. 3. her / to / They / want / succeed. 4. made / clean/parents/my/me/room/my. 5. a/ heard/I/ singing/bird. 6.to/him / We / expect / arrive / soon. 7. watched / The / carefully / the / experiment / scientists/being performed. 8. see /1/ the / leaves / falling/can. 9. made / the / The / cry/movie/ her. 10. them / the / I / didn't/notice/ leave / party.