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1、高一英语语法大全高一英语语法大全虚拟语气在各种从句的应用主语从句的虚拟1. it is + adj. + that sb. (should) do常见的形容词有：necessary, important, strange, naturalits important that he take my advice.2. it is + n. + that sb. (should) do常见的名词有：a pity, a shame, no wonder, ones wishits a pity that he be so silly.3. it is + done + that sb. (shoul
2、d) do常见的过去分词有：suggested, advised, demanded, requested, required, asked, ordered,proposed, decided, desired, insisted等。its requested that she go home as soon as possible.宾语从句的虚拟1. 表命令，表建议，表要求的动词，后接宾语从句虚拟。虚拟的构成为(should) do。i advise that he stay at home.2. wish后接从句，虚拟的构成是往过去推一个时态。i wish i had watched t
3、he football match last night.注意以下几组词或短语用于虚拟语气中。1. as if, as thoughhe speaks english as if he were a native speaker.2. otherwise, but, even thoughhe was ill. otherwise he would have been there.3. with, without, but forwithout your help, i would have died two years ago.but for your help, i would have
4、died two years ago.4. would rather id rather you told me yourself.5. its time thatits time that you went to bed.its time that you should go to bed.表语从句中的虚拟在表语从句中，表示间接的命令，要求、请求、建议、决定等，主句中的主语通常是suggestion, proposal, request, orders, idea等。从句谓语形式是(should)+动词原形。如：his suggestion is that we (should) leave
5、 at once.名词从句部分1. that不可省略的情况2. that引导同位语从句和that引导定语从句的区别：同位语从句中的that是连词，不做成分，只连接主从句，不能省略;定语从句中的that要代替先行词在从句中做主语、宾语或者表语，并且做宾语时可以省略。从语义上看，同位语从句是对前面名词的解释、说明或内容;而定语从句时对前面名词的限定。we should consider the studentsrequest that the school library provide more books onpopular science. (that引导同位语从句)the only hop
6、e that he expressed was that they would do what they could to help the peoplein disaster areas. (that引导定语从句)3. 要根据句子结构尤其是谓语动词判断从句的类型：what is known to us all is that the 2008 olympic games took place in beijing.本句含有一个主语从句和一个表语从句，主句的动词为is。it is known to us all that the 2008 olympic games took place in
7、 beijing.本句含有一个主语从句，主句的动词为is known to。as is known to us all, the 2008 olympic games took place in beijing.本句含有一个定语从句，主句的动词为took place，as引导非限制性定语从句。4. 名词性从句的语序和语态。名词性从句均应用陈述语序，不能用疑问语序，其时态应该和主句时态保持一致。5. 名词性从句中连词的省略。介词后的连词以及引导主语从句和同位语从句的连词不可省略。that引导名词从句(除了引导第一个宾语从句可省略外)都不可省略，但是引导定语从句并在从句中做宾语时可以省略。that不能省略的