1、高中英语常用句型结构精讲句型1：Its+adj.+to do sth.【基础过关】Its+adj.+to do sth.是固定句型，其中it作形式主语，真正的主语是后面的动词不定式。It is necessary to master a foreign language=To master a foreign language is necessary掌握一门外语是必要的。【拓展延伸】Its+adj./n. (for sb./of sb.)+to do sth.1） It is adj./n.(for sb.) to do sth. 若要说明动词不定式的动作是由谁做的时候，后接for sb.。
2、能用于这个句型的形容词有：difficult，hard，easy， possible，necessary，important等。It was very difficult for him to finish the work on time.对他来说,按时完成这项工作很难。It is important for us to learn English.学习英语对我们来说很重要。It is very common for students to be physically present in class, but mentally absent because they are using t
3、heir mobiles.对于学生来说，他们人在教室却心不在焉的情况非常普遍，因为他们在玩手机。2）It is adj ./n. (of sb.) to do sth. 若要说明动词不定式的逻辑主语的性质、品质、特性时，后接of sb.。能用于这个句型的形容词有：good，kind，nice，clever，wise，foolish，silly，stupid，right，wrong，rude，(im)polite，careless，careful等。It is very kind of you to help me=Youre very kind to help me你真是太好了来帮助我。Its
4、 wrong of the other children to make fun of you.别的孩子取笑你，这是错误的。Its silly of you to ask such questions.你提出这样的问题实在太傻了。句型2：be doingwhen“正在做这时”【基础过关】be doingwhen是一常用句型，意为：正在这时(突然)；when在句中作并列连词，意为“这时(突然)”，相当于and then，and at that time。I was watching TV at night when someone knocked at the door晚上我正在看电视，这时有人
5、敲门。The man was sleeping downstairs when the earthquake happened这名男子正在楼下睡觉。这时地震突然发生了。I was walking along the street when I heard my name called我正在街上走着，突然听到有人叫我。【拓展延伸】1）be about to dowhen正要这时(突然)。I was about to get out the room when the door was opened 我正打算走出这房间突然门就被打开了。One day,I was about to do some
6、shopping when he telephoned me.一天,我正要去买东西,他打电话找我。2）be on the point of doingwhen正要这时 (突然)She wasonthepointofgoing outwhenthetelephone rang. 她正要出去，电话铃响了。Iwasonthepointoftelephoning him whenhisletterarrived.我正要给他打电话,这时他的信到了。3）had just donewhen刚做完这时I had just gone to bed after a very hard day when the p
7、hone rang.在劳累了一天之后，我刚上床睡觉，这时电话响了。He had just rushed into the classroom when the teacher came in.他刚跑进教室，这时老师进来了。句型3：祈使句and陈述句【基础过关】“祈使句and陈述句”表示祈使句与后面的句子是顺承关系。Take more exercise and youll feel healthy.多锻炼身体，你就会身体健康。Learn to understand, and you will keep away from a world full of sadness and disappoin
8、tment.学会理解，你就会远离满是悲伤和失望的世界。【拓展延伸】（1）“祈使句or/or else/otherwise陈述句” 相当于“if 否定条件状语从句主句”。Work hard, or you will fail in the exam. 努力学习，否则你考试不及格。Follow your teachers advice, or/or else/otherwise you will fail in the exam.听从老师的建议，否则你考试就会不及格。Takethechance,oryouwillregretit.抓住机会吧，否则你会遗憾的。Do as youre told, ot
9、herwise youll be in trouble叫你怎么做就怎么做， 否则你会有麻烦的。（2）“名词词组and陈述句” 名词词组中通常含有more,another,further,earlier等词。More fined food, and youll be healthier and healthier.多吃好的食品，你会越来越健康。Another500,andIcouldbuyacar假如我再有500镑，就能买辆小汽车了。A few minutes earlier, and I could have seen the famous scientist要是我早来几分钟， 就能见到那位著
10、名的科学家了。句型4：主语+谓语动词+it+adj.+to do sth.【基础过关】主语+谓语动词+it+adj.+to do sth.此句型中的it是形式宾语，不可用其它代词替代，形容词作宾语的补足语，后面的动词不定式（短语）才是真正的宾语。 用于句型中的谓语动词有：believe, consider, count, feel, find, imagine, think, make, suppose, take, etc.。We consider it not useful to do it.我们认为做那事是没有用的。I find it pleasant to work with him.
11、我觉得和他一起工作很愉快.They felt it difficult to finish the work in such a short time.他们认为在这么短的时间内完成这项工作是困难的.【拓展延伸】上述句型可拓展为：主语+谓语动词+it+adj.for sb./of sb.+to do sth.若要说明动词不定式的动作是由谁做的时候，后接for sb.。若要说明动词不定式的逻辑主语的性质、品质、特性时，后接of sb.。I find it hard for him to work the problem out.我发现解决这个问题对他来说很难。I feel it foolish o
12、f him to believe such a man. 我觉得他相信这样一个人是愚蠢的。The timely rain had made it possible for the crops to grow well及时的雨水使庄稼长得很好。句型5：It takes sb sometime to do sth. 做某事花费某人多长时间【基础过关】句型表示“做某事花费某人多少时间。”其中的it是形式主语，后面的动词不定式（短语）才是真正的主语。It took me years to get back on my feet.我花了好几年才重新找到自己。How long will it take y
13、ou to complete the trip? 完成这次旅行你要花多长时间？It took us ten minutes to work out this problem.我们花了十分钟来解决这个问题。【拓展延伸】表达“花费”的其他句型：(1)sb. spend.on/in doing sth. She spent ten dollars shopping for food.她购买食品花了10美元。Ispenttwohoursonthismathproblem.我花了两个小时做这道数学题。Theyspenttwoyears(in)buildingthisbridge.他们花了两年时间造这座桥
14、。(2)Sth.cost sb.+ money.(某物花费某人多少钱）Sth.cost + money.(某物价值多少钱）Anewcomputercostsalotofmoney.买一台新电脑要花一大笔钱。Rememberingthesenewwordscosthimalotoftime.他花了大量时间才记住了这些单词。It costs us a lot of money to build a house.盖房子花了我们很多钱。(3)sb. pay钱for sth. I paid him $200 for this painting.我付他200美元买了这幅画。Ihavetopaythem20poundsforthisroomeachmonth.我每个月要付他们20英磅的房租。
