1. It's+adj.+for sb.+to do sth. 对某人来说做某事怎么样，
如:
It is dangerous for children to play in the street. 孩子们在街上玩是很危险的。
2. It's time for sth. 是干某事的时间了；
It's time(for sb.)to do sth.该干某事了。如：
①It's time for the meeting. 该开会了。
②It's time for us to go to school. 我们该上学了。
3. It takes sb. some time to do sth.
做某事花某人一些时间。
sb. spend some time/money on sth./(in)doing sth. 某人花时间(金钱)在某事上/花时间(金钱)干某事。
sth. cost sb. some money 某事花某人一些钱。
pay some money for sth.为某事(物)付钱。如：
① It took me two hours to write the letter. 写这封信花了我两小时的时间。
② He spends half an hour(in)reading English every morning.他每天早上花半小时读英语。
③ He spends one hour on the housework every day. 他每天花一小时做家务。
④ The bike cost me 500 yuan. 这辆自行车花了我500元。
⑤ I spent 500 yuan on the bike. 我买这辆自行车花了500元。
⑥ I paid 500 yuan for the bike. 我花了500元买这辆自行车。
重要提示：
cost主语一般为物；spend, pay主语一般为人。例 ① 中it用作形式主语，动词不定式为真正主语。
4. too+形容词/副词+to do... 太……以致不能…… 如：
① I was too excited to say a word.
我激动得一个字也说不出来。
② Tom is too short to reach the apple.
Tom太矮了,拿不到那个苹果。
重要提示：
这是一个否定句型，不能在不定式前加not，可以用so... that...结构改写。例句 ① 可以改写成：I was so excited that I couldn’t say a word.
5. so that...以便/以致…… 如：
① They studied hard so that they could pass the exam. 为了能通过考试,他们学习很努力。
② They started early so that they caught the early bus. 他们起得很早,结果赶上了早班车。
重要提示：
在例句①中，是引导目的状语;在例句②中，是引导结果状语。一般来讲，若从句中含有情态动词，则so that引导的为目的状语。若无情态动词，则so that引导的为结果状语。
6. 祈使句+then/or/and+陈述句 如：
①Work hard,and/then/and then you will live a happy life. 努力工作，你就会过上幸福的生活。
②Hurry up,or we will be late for school. 快点，否则我们上学就迟到了。
注意：以上句型都可以用条件状语从句来改写。例句②可以改写成：If we don't hurry up, we'll be late for school.
7. 表达建议的句型，如：
Why not do...? 为什么不……?
Let's do... 让我们做……吧。
Shall we do...?我们做……好吗?
Would you like/to do...?
你想要(做)……吗?
Will you please do...?
请你做……好吗?
What(How)about doing...?
做……怎么样?
had better do/not do sth.
最好做/不做某事。如:
①—Why not go and ask our teacher? ——为什么不去问问老师?
—Good idea! Let's go. ——好主意!走吧!
②—Shall we go out for a walk? ——我们去散步怎么样?
—No,Let's go to the zoo. ——不,我们去动物园吧。
③Will you please fetch some chalks for me?请你给我拿些粉笔,好吗?
④—What about singing an English song? ——唱首英文歌曲怎么样?
—Wonderful! ——好极了!
⑤You had better put on the coat when you go out.你出去时最好把外套穿上。
8. I don't think his answer is right.
我认为他的答案不对。
I can't believe she is right.我相信她是不对的。
You don't think they will come tomorrow,do you?你认为他们明天不会来,是吗?
重要提醒：
think,believe,suppose等接宾语从句，表示否定时要否定主句。变为反意疑问句时，若主语是第一人称，简短问句与宾语从句的主谓语保持一致，若主句主语是其他人称，与主句主谓语保持一致。例句①变为反意疑问句应为：I can't believe she is right,is she?
9. such+名词性词组+that...；so+形容词/副词+that... 如此……以致……
如：
①She is such a good teacher that we all love her.她是一个好老师,我们都爱她。
②It was such a hot day that they didn't go out for a walk as usual.这么热的天气,他们没有像往常一样去散步。
重要提醒：
(1)“such+a(an)+形容词+名词+that...”，可以改写成“so+形容词+a(an)+名词+that...”，例句①可以改写成：She is so good a teacher that we all love her.
(2)在“such+形容词+名词复数或不可数名词+that...”结构中，形容词如果是many/few或much/little时，用so不用such，即：so+many/few+可数名词复数+that... ，so+much/little+不可数名词+that...
10. there be...;either... or...;neither... nor...;not only... but also...
如：
①There is a pen and two pencils in his pencil-box. 他的铅笔盒里有一支钢笔和两支铅笔。
②Not only you but also I want to go travelling. 不但你，我也想去旅游。
③Either you or I am leaving for Shanghai. 要么你去上海，要么我去上海。
④Neither you nor he is right. 你和他都不对。
⑤Both Jack and Tim are English. Jack和Tim都是英国人。
重要提示：
当这几个句型连接主语时，谓语动词的人称和数要遵循“就近原则”。对比both... and...来记忆，both... and...连接主语时视为复数。
11. enough+名词+to do... 有足够的……做某事；
形容词/副词+enough+to do... 足够……做某事。如：
①There is enough room to hold these people to have a meeting. 有足够的地方容下这些人开会。
②The boy is strong enough to carry the heavy box. 这个男孩儿力气够大,能搬动这只箱子。
重要提示：
enough作副词修饰形容词或副词时，放在所修饰词的后面，句子可以用so... that...句型改写。例句②可以改写为：The boy is so strong that he can carry the heavy box.
12. enjoy doing sth.喜欢(爱好)做某事；
like to do/like doing sth.喜欢做某事。如：
①Do you enjoy listening to music? 你喜欢听音乐吗?
②I like to swim in the swimming pool. 我喜欢在游泳池中游泳。(喜欢到某一具体的地方游泳)
③I like swimming. 我喜欢游泳。(只讲喜欢这项运动)
