[原句回放1] Thank you for making English fun! (Lesson 1)

[精彩点拨] “Thank sb. for (doing) sth.” 表示“因（做）某事感谢某人”，其中介词用for,其后动词用V-ing形式。

[情景例句] Thank you for your help. ( = Thank you for helping me. )谢谢你帮助我。

[原句回放2] 1. I’m thinking about what to say. ( Lesson 2 ) 2. The students at school often ask him how to spell his name. (Lesson 4 )

[精彩点拨] What to say 和how to spell his name都是“疑问词+不定式”构成的短语，分别作think about 和ask的宾语。这种结构相当于一个宾语从句，往往用在tell, ask, know, teach, learn等动词后作宾语。

[情景例句] You must tell me where to meet you. (=You must tell me where I’ll meet you. ) 你必须告诉我在哪儿与你见面。

[原句回放3] Why don’t you talk about names? (Lesson 2)

[精彩点拨] Why don’t you...？这一句式常用来表示一种建议、劝告或征求对方的意见。其简略句型是Why not +动词原形？

[情景例句] Why don’t you come a little earlier? (= Why not come a little earlier?) 你为什么不早点来呢？

[原句回放4] But they have some problems getting there. ( Lesson 6)

[精彩点拨] have problems (in) doing sth. 这一句型表示“做某事有困难”。介词in指某一方面，在句中可以省略，后面接V-ing形式。该句型中的problems还可用difficulty或trouble代替。

[情景例句] Do you have problems (in) learning English? 你学英语有困难吗？

[原句回放5] It takes too long. (Lesson 7 )

[精彩点拨] take意为“花费”、“需要（多少时间）”，常用下列两种句型：1.Sth. takes (+sb.) +时间 “某事花费（某人）多长时间”；2. It takes+（sb.）+时间+to do sth. “（某人）花费时间做某事”。

[情景例句] It takes her an hour to play table tennis every day. 她每天用一小时打乒乓球。

[原句回放6] What do you want to buy that for? （Lesson 11）

[精彩点拨] what...for 是一个常用句式，问做某事的目的。

[情景例句] What do you want paper for? 你要纸干什么？

[原句回放7] In the country, he can hear birds singing and sheep bleating. ( Lesson 14)

[精彩点拨] hear sb. / sth. doing (do) sth. 表示“听见某人（或某物）（正在）做某事”。hear, see, watch等感官动词后面跟动词原形表示动作全过程；接V-ing形式，表示动作正在进行。

[情景例句] I hear him sing the song. 我听见他唱过这首歌。

I hear him singing when I pass his room. 当我走过他房间时，听见他正在唱歌。

[原句回放8] Often Kate reads until late at night. (Lesson 15 )

[精彩点拨]until用于肯定句，主句中必须用延续性动词表示“到……为止”；用在否定句中，not...until表示“直到……才”，此时主句动词用终止性动词。

[情景例句] He worked until his mother came back. 他一直工作到他妈妈回来为止。

He didn’t go out until he finished his homework. 直到做完作业他才出去。

[原句回放9] But I do not think it’s good for animals to stay in cages. (Lesson 18)

[精彩点拨1] 在 “I think+从句” 这一句型中，如果从句是否定句时，习惯上把从句中的否定词not提到think前，即“I don’t think +肯定形式的从句”。

[情景例句] I didn’t think he could come back on time. 我认为他不能按时回来。

[精彩点拨2] It is / was +adj. (+for/ sb.)+to do sth. 表示“（对某人来说）做某事是……”。该句型中的it是形式主语，而不定式短语to do sth. 才是真正的主语，这种用法主要是为了保持句子的平衡。

[情景例句] It’s important for us to learn a foreign language. 对于我们来说学好一门外语是重要的。

[原句回放10] The six students must keep their hands behind their backs. ( lesson 23 )

[精彩点拨] “keep+宾语+宾语补足语”表示使“某人（某物）保持/处于某种状态”。宾语可以是人或物，宾语补足语通常由形容词、介词短语、V-ing形式来充当。

[情景例句] Doing exercise keeps us healthy.体育锻炼使我们保持健康。

Don’t keep us waiting for long. 别让我们久等。

[原句回放11] He finds it very hard to travel around the big city. ( Lesson 24)

[精彩点拨] “find it +adj. +to do sth.” 表示“发现（觉得）做某事怎么样”。句中it是形式宾语，真正的宾语是后面的动词不定式。

[情景例句] I found it interesting to learn English. 我觉得学英语很有趣。

[原句回放12] We have a problem with this computer. ( Lesson 32)

[精彩点拨] have a problem with.... “某物出了什么问题”，这一句型相当于There’s something wrong with ...。

[情景例句] I have a problem with my car (= There’s something wrong with my car. ) 我这辆车有毛病了。

[原句回放13] How often were you ill? (Lesson 53)

[精彩点拨] how often表示“多久（多长时间）一次”，主要是针对状态或动作的频率提问。

[情景例句]—How often do you write to your parents?你多久给你父母写一次信？

—Once a week.一周写一次。