精品高中英语it用法知识点总结.doc
高中英语it用法知识点总结_It的用法是高中英语知识点之语法考查的热点和重点。它的用法多，考察形式多样，要求广大考生全面掌握其基本用法。酷课网根据历年高考对it用法考察归纳总结了高考常考点及注意事项。1.It is+被强调部分+that该句型是强调句型，将被强调的放在前面，其他部分置于之后，(强调的主语如果是人，可以用who来替换that) 如果把这种句型结构划掉后，应该是一个完整无缺的句子，这也是判断强调句型与其他从句的方法。(如果强调的是动词就要用到do的各种形式)It was they that (who) cleaned the classroom yesterday.-Where did you buy the apples?-It was on the farm where we worked. (True)-It was on the farm that we worked.(False) 注解：如用that，答非所问。考点：强调句和定语从句的综合考查。2. It is not until +被强调的部分+ that考点：强调句 和倒装句强调句：It was not until she took off her dark glasses that I realized she was a film star.倒装句： Not until she took off her dark glasses did I realise she was afilm star.注意事项：是主句倒装，分句不倒装。3. It is clear (obvious, true, possible, certain) that .该句型中it是形式主语，真正的主语是that引导的主语从句，常译为 清楚(显然、真的、肯定) 是主语从句最常见的结构。It is very clear that he s round and tall like a tree.4. It is important (necessary, right, strange, natural ) that 该句型和上一句同属一个句型。由于主句中的形容词不同，that后的从句中要用虚拟语气(should+动词原形)should 可以省去。建议记住该句型中的形容词。It is important that we (should) learn English well.It is necessary that he (should) remember these words.考点：主语从句和虚拟语气的综合。5. It is said (reported, learned, believed ) that 该句型中的it 仍是形式主语，真正的主语是that 引导的主语从句。该结构常译为 据说(据报道，据悉 )It is said that he has come to Beijing.It is reported that another earth satellite has been put into orbit.考点：考察主语从句中时态的选择。 后用现在完成时表示从句动词发生在主句谓语动词之前。6. It is suggested (ordered ) that 该句型和上一句属一个句型。主句中的过去分词是表示请求、建议、命令等词时，that后的从句要用虚拟语气 (should+动词原形)。可以省略，常译为 据建议;有命令 It is suggested that the meeting (should) be put off.It was ordered that we (should) arrive there in two hours.7. It is a pity (a shame ) that 在该句型中，that后的从句一般用虚拟语气(should+动词原形)，should可以省去，表示出乎意料，常译为 竟然 。没有这种意义时，则不用虚拟语气。 It is a pity that such a thing (should) happen in your class.这种事竟然发生在你们班上，真是遗憾。It is a pity that he is ill.他生病了，真遗憾!8. It is time (about time, high time) that 考点：考察从句后的时态选择。(用过去时或者should do)该句型中that后的从句应该用虚拟语气，值得注意的是：常用过去时态表示虚拟，有时也用should+动词原形，should 不能省。常译为 是(正是) 的时候 It is time that children should go to bed.=It is time that children went to bed.9. It is the first ( second, )time that 该句型应和上一个句型区别开来。该句型中不用虚拟语气，而用完成时态。至于用哪种完成时态，由主句的谓语动词的时态来决定。如果是一般现在时，从句用现在完成时态;如果是一般过去时，从句则用过去完成时态。该结构中that可以省去;it有时用this替换，常译为 是第一(二, )次 。It is the first time that I have come to Beijing.10. It is since 该句型主要用作处理瞬间动词的完成时，要和表示一段时间的时间状语连用。主句中是时间作表语，其时态是现在时和完成时，引导的从句通常是一般过去时态，而且是瞬间动词。如果主句是一般过去时，从句则用过去完成时。第 5 页 共 5 页
