ex3. complte the sentenses with v -ing or v-inf
1. my father gave up { smoke } _______________ three years ago
2. I have put off { write } ______________ the letter so many times . I really must do it today
3. you can't stop me { do } ___________ what I want
4. how long have you been able { swim } __________ john ?
5. please , don't forget { post } ____________ the letter for me today it is urgent
6. she often remembere { talk } _____________ to her father before he became ill
7. you must remembere { buy } ______________ some suger . we haven't got any now
8. don't forget { wake } _____________ me up before sic o'clock tomorrow