I/ Chuyển các câu sau sang thể bị động
1. I have heard her sing this song several times.
.....She has been heard to sing this song several times ......
2. The detective looked the man putting the jewerlry in this bag.
.....The man was looked putting the jewerlry in this bag by the detective......
II. Causative forms:
1.Toshico had a mechanic repair her car.
.......Toshico had her car repaired by a mechanic..........
2. Elen got Marvin type her paper.
.....Elen got her paper typed by Marvin.......
3. We got them paint our house last week
........We got our house painted last week......
4. Maria is having Rose cut her hair tomorrow.
......Maria is having her hair cut by Rose tomorrow......
5. My sister has had them make a new dress recently.
......My sister has had a new dress made recently........
III/ Chuyển các câu sau sang thể chủ động
1. Is mathematics taught in this school?
......Do they teach Mathematics in this school?........
2. Apples are said to be good for our health
.......People say that apples are good for our health........
3. They couldn't be found anywhere.
........People couldn't find them anywhere..........