AEIS英语语法：名词从句做主语

　　AEIS语法分值低以及题目的简单并不意味着考生就不必太过重视语法学习，因为作文、完形填空和阅读理解都有语法知识的运用。今天小编继续分享AEIS语法知识点：名词从句做主语

　　1.名词从句

　　他不用功令我生气。

　　这个句子的主语虽然是“他不用功”，但若译成he doesn't work hard,则大错特错。

　　he doesn't work hard makes me angry.(x)

　　因为he doesn't work hard是句子。所谓句子，就是一开头就是主语的结构(此处的he就是主语)。句子绝不能当主语，一定要变成名词从句方可做主语。故本句的正确译法应为：that he doesn't work hard makes me angry,(o)

　　2.名词从句的种类

　　名词从句一共有三种：that从句、whether从句、疑问词所引导的从句

　　(1)that从句

　　任何一个主语起首的句子前面冠以that即成that从句。

　　he doesn't believe my words.-----that he doesn't believe my words(他不相信我说的话。)

　　he enjoys dancing.-----that he enjoys dancing.(他爱跳舞。)

　　there is much work to do.-----that there is much work to do(有很多工作要做。)

　　(2)whether从句

　　本从句是由可用yes/no回答的问句变化而成。

　　①问句有be动词时：主语与be动词还原，前面冠以whether.

　　例：is he happy?-----whether he is happy(他是否快乐……)

　　②问句有一般助动词(can,will,may,should,ought to,must,have)时：主语与助动词还原，前面冠以whether。

　　例：can he do it?-----whether he can do it(他是否能做这件事……)

　　has he done it?-----whether he has done it(他是否已做好这件事……)

　　③问句有do,does,did等助动词时：主语与助动词还原，再将do,does,did去掉，后面的动词依人称和时态变化。

　　例：did he come?-----whether he did come(did为过去式，故come改为came)----whether he came(他来不来……)

　　does he like it?----whether he does like it(does为第三人称单数现在式，故like改为likes)----whether he likes it(他喜不喜欢它……)

　　(3)疑问词从句

　　本从句是由疑问词(when,what,how,where,why)等引导的问句变化而成。

　　①问句有be动词时：主语与be动词还原，前面保留疑问词。

　　例：what is he doing?----what he is doing(他正在做什么……)

　　②问句有一般助动词时：主语与助动词还原，前面保留疑问词。

　　例：where can be find it?----where he can find it(他在哪里能找到它……)

　　③问句有do,does,did等助动词时：主语与助动词还原，前面保留疑问词，再将do,does,did去掉，动词依人称和时态变化。

　　例：what did he write?----what he did write(did为过去式，故write改为wrote)----what he wrote(他写什么……)

　　when did he come?----when he did come(did为过去式，故come改为came)----when he came(他何时来……)

　　how does he do it?----how he does do it(does为第三人称单数现在式，故do改为does)----how he does it(他怎么做这件事……)

　　注意：

　　who,what,which(哪一个)为疑问代词，若在问句中做主语，变成名词从句时，结构不变。

　　例：who came here?问句主语----who came here名词从句(谁来这儿……)

　　what happened last night?问句主语----what happened last night名词从句(昨晚发生什么事……)

　　which was bought?问句主语----which was bought名词从句(哪个被买走……)

　　3.名词从句的功能

　　我们已知，名词从句是由叙述句子或问句变化而成，和动名词或不定式短语一样，名词从句也要被视为名词。由于具有名词的特性，故可做主语、谓语或be动词之后的补语。

　　(1)名词从句做主语

　　例：that honesty is the best policy is a proverb(which)we should always keep in mind.(“诚实为上策”是一句我们应时时谨记在心的箴言。)

　　where he lives is still a doubt.(他住哪里仍不确定。)

　　whether he can do it remains to be seen.(他能胜任与否仍有待观察。)　　

　　以上就是小编为大家整理的关于AEIS语法知识点之名词词性用法汇总，希望对大家有所帮助。更多AEIS报名资料、新加坡AEIS考试考题等问题可以咨询我们。