16.had better do sth.最好干某事.

　　否定:had better not do sth.

　　特別注意:had better后面跟be動詞詞組,不可漏掉be.

　　eg.You’d better catch a train.

　　You’d better not talk in class.

　　You’d better not be late for the class.

　　17.It is good (nice)of+賓格+to do sth.

　　eg.It is very good of you to teach me English. (你教我英語真是太好了)

　　18.It takes sb. some time to do sth.(干某事化費(fèi)某人多少時間)

　　=sb.spend some time on sth. (in) doing sth.

　　eg.It took me half an hour to do the work. =I spent half anhourin doing the work.

　　19.sb.pay 錢 for 物 某物化費(fèi)了某人多少錢 =sb.spend 錢 on 物 =物 cost sb.錢

　　pay的過去式為paid 而不是payed.

　　eg.I paid thirty yuan for the coat.

　　=I spent thirty yuan on the coat.

　　=The coat cost me thirty yuan.

　　20.have been to 某人曾去過某地,現(xiàn)在人不在那兒

　　sb.have been in +地點(diǎn) 某人呆在某地(一段時間)

　　have gone to 某人已去某地,人不在這兒

　　21.⑴ too…形容詞(副詞)+to…"太…而不能" "太…以致于不"

　　eg.①The basket is too heavy for me to carry. 這籃子太重我拿不動。

　　②This colour TV is too expensive for us to buy. 這臺彩電對我們來說太貴了，買不起。

　　⑵so...that 如此...以致于...

　　上面的too...to結(jié)構(gòu)的句子，可以換成so...that 引導(dǎo)的句子轉(zhuǎn)換。

　　①The basket is so heavy that I can’t carry it.

　　②This colour TV is so expensive that we can’t afford it.

　　22.What’s the population of ...? ...人口有多少？

　　不說How much population in...?形容人口數(shù)量的大用large

　　eg.The population of China is ten times as large as that of the USA

　　23.I’ve come to return your pan. (我跑來是還你鍋的) →Why have you come? 而不用What

　　24.not...until (連詞)方才，才

　　eg.He says that he won’t be free until tomorrow.他說他需到明天方才有空。

　　肯定句＋until 到

　　eg.You’d better wait until tomorrow. (你最好等到明天)

　　25.neither...nor... 既不...也不...

　　either...or... 或者...或者...

　　eg.Neither Tom nor his brothers know how to spell the word "hundred".

　　Either you or she is right. (謂語動詞就近原則)

　　both...and... 兩者都...

　　eg.Both Jim and I are in Grade One (主語看作復(fù)數(shù))

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