⑤区别sound / noise / voice

sound 的含义最广，凡是能听得见的声音都可以叫sound

noise通常指"噪声"；

voice专门指人的声音

⑥in order to do sth 为了...

例：In order to have a bright future, we need to work hard.

so as (not) to也表目的　一般放在句中

⑦While the children have fun, parents can take dance lessons on the beach..

区别while与when

when兼指"时间点"与"时间段"，所引导的从句的动词既可以是终止性动词，也可是持续性动词。

When the teacher came in, we were talking.

I jumped up when she called.

while只指"时间段"，不指"时间点"，从句的动词只限于持续性动词。

While I slept, a thief broke in.

⑧Go past the bookstore.

Go past相当于pass 区别past over across through

past 晚于；从。。。旁边经过

over 从。。。上方跨过

across 横穿；越过（强调从一端到另一端）

through 穿过；越过（强调从内部穿过）

⑨I was scared at first, but shouting really did help.

类似的句子：He does come from America.

⑩I suggest Water City Restaurant in Water World.

建议某人做某事不能用suggest sb to do sth,但可以用advise sb to do sth

11.When you visit a foreign country, it is important to know how to ask for help politely.

12. Sometimes we even need to spend time leading in to a request.

即学即练：

单选

16. A: I enjoyed the performance very much.

B: Yes, it was really good. I think ________ boy in white was the best actor.

A: a B: an C: the D: /

17. I always tell my students _________ on the road because it's really dangerous.

A. not to play B. to play not C. not playing D. not play

18. The man called his professor for help because he couldn't solve the problem by _________.

A. herself B. himself C. yourself D. themselves

19. Could you say it again? I can't understand __________ you are talking about.

A. how B. when C. what D. which

20. --- Must I finish my homework now?

--- No, you ________. You can go home now.

A. needn't B. mustn't C. shouldn't D. can't

21. There is _________ news about this movie star in the newspaper. Where can I get some?

A. many B. a few C. a lot D. little

22. I couldn't do it ________ your great help. Thanks a lot!

A. with B. without C. for D. to

23. Thanks for your invitation, but I'm so sorry I can't go. I need to ________ my baby at home.

A. take away B. take off C. take care of D. take out of