3、hear与listen to：hear侧重点是听到，听见什么，而listen to是侧重于听的倾向，但hear用于无意中的听见，而listen to却用于集中注意力的听。

2、rise和raise：rise是不及物动词，其过去式是rose，过去分词是risen，而raise是及物动词，是规则动词。

1、lay(放), lie(躺)与lie(说谎)：这三个易混动词构成见下表：

40. There ________ be a lot of small houses on both sides of the street.

A. used to　　　　　 B. get used to　　　　　　　　 C. would　　　　　　　 D. did use to

39. The girl _________ out alone at night.

　 A. dare not go　　　　 B. dare not to go　　　　　　 C. dares not go　　　　　 D. does not dare go

38. You _________ pay more attention to your spelling next time.

　 　 　A. would　　 　　　 B. should　　 　　　　 C. will　　 　　　　　 D. shall

37. You _________ do the exercise if you don't want to.

　 　 　A. may not　　 　 B. can't　　 　　　　　 C. mustn't　　 　　　 　　　 　D. needn't

36. "May I go now?" "No, you ________. "

　　 A. mustn't　 　　　　 　B. needn't　　　　　 　　 C. mightn't　 　　　　　　　 　D. won't

35. The teacher told the students that they ________ keep silent in class all the time.

　　 A. ought to not　　　　　 B. ought not to　　　　　　　　　　 C. ought not to have　　　 D. can't

34. You _________ me about it earlier, but you didn't.

　　 A. should have told　　　　 B. would have told　　　　　　　 C. must have told　　　　 D. should tell