2.　　　 not … until 直到…才　 The noise of the street didn’t stop until midnight .

Lesson 16

1.　　　 动名词短语作主语时，谓语用单数形式。Answering these questions is not easy .

11. stop ding sth 停止正在做的事情　　 stop to do sth 停止正做的事而去做另外一件事

Lesson 15

10. play with sb, sth 和…一起玩，玩弄…　 Don’t play with fire . 但，play 和球类、乐器连用时不用with .

8. spring 春 summer 夏 autumn 秋 winter 冬　 用介词in .

7. like …better(than)… 更喜欢…　 like …best(of all) 最喜欢…

6. hear 强调听的后果　 listen to 强调听的动作　 They are listening to me carefully, but they hear nothing .

5. hear / see / find / watch / feel / notice +(省to)do sth (动作全过程) / doing sth(正在进行)

　 I saw him go into the room . I hear her singing in the next room .

4. in the country = in the countryside　 在乡下　　 in town 在城镇(不用the )

3. use sth to do sth 用…做某事　　 We use a life to cut things .