语法可以说是不少同学的心头痛,今天小编就为大家整理了AEIS英语语法知识点点,内容较长,语法薄弱的同学可以收藏起来慢慢看哦。在句中起主语作用的从句称为主语从句。连接主语从句的连接词主要有三类:从属连词,连接代词和连接副词。
一、that引导的状语从句
That引导主语从句时,在从句中不作任何成分,也没有实际意义。一般情况下that不可省略。
1)that引导的主语从句置于句首
例句:Thatthe moon travels around the earth once every month is known to everyone.
众所周知,月亮每月绕地球运行一周。
例句:Thatshe was chosen to participate in the festivals makes us very happy.
她被选中去参加庆祝活动使我们很高兴。
2)形式主语it替代主语从句
That从句作主语通常用it作先行词,而将that从句置于句末。常见的it替代主语从句的句式主要有如下几种:
① It+系动词+形容词+that从句
例句:It it likely thathe can't come to the party tonight.
他很可能不来参加今晚的聚会了。
例句:It is obvious thatyou've made a big mistake.
很明显你犯了一个大错。
注意!在“It is necessary/important/surprising/strange/unthinkable/unbelievable/incredible+that从句”结构中,从句谓语常用“should——动词原形”形式,其中should可省略。
例句:It is important that a colleague student (should) learn English well.
大学生学好英语是重要的。
例句:It is necessary that you (should) remember these words.
你有必要记住这些词。
② It+系动词+名词+that从句
例句:It's no secret thatthere is a lot to put up with when waiting tables,and fortunately,much of it can be easily forgotten when you pocket the tips.
站在桌边等待顾客点菜时需要容忍很多事情,这已经不是什么秘密了。幸运的是,当你拿到小费时,就会忘记很多的不满。
例句:It is a pity thatyou didn't attend Mary's wedding party.
你没参加玛丽的婚宴真是遗憾。
例句:It's no wonder thatyou are late again.
难怪你又迟到了。
③ It+be+动词的-ed形式+that从句
例句:It's often said thatonly the rich are getting ahead;everyone else is standing still or failing behind.
人们常说,只有富人的生活在进步,其他人的生活不是原地踏步就是落后于他人。
例句:It is reported thatno passengers were injured in the accident.
据报道在事故中没有乘客受伤。
注意!在“It+be+suggested/advised/ordered/requested/required/insisted/required/demanded+that从句”结构中,that从句应用“should+动词原形”,should也可省略。
例句:It is suggested that the meeting (should) be put off.
这次会议应该推迟召开。
例句:It was ordered that we (should) arrive there in half an hour.
我们必须在半个小时内到达那里。
④ It+特殊助词+that从句
例句:It seemsto methatyou don't like the idea.
在我看来,你好像不喜欢这个主意。
例句:Itreallymatters thatyou have won the game.
你们赢了这场比赛,这的确很关键。
例句:It turns out thateverything goes well.
结果是一切顺利。
二、whether引导的状语从句
Whether引导的主语从句可置于句首,if一般不引导主语从句。
例句:Whetherhe can finish his task on time is of great importance.
他是否能按时完成任务非常重要。
例句:Whetherwe will build another lecture building has not been decided.
我们是否要建另一幢教学楼还没有决定。
三、wh-类连接词引导的状语从句
Wh-类连接词包括wh-类的连接代词(who,whom,whose,what,whoever,whomever,whosever,whatever等)和连接副词(when,where,how,why,whenever,wherever,however等)。What也可不表示疑问,表示“......的事、话、东西”等。
Wh-类连接代词或连接副词引导的主语从句可放于句首也可放于句尾,放于句尾需要用形式主语替代wh-从句。
例句:Whatis taught (and how) in this first encounter will largely determine an individual's view of the subject in adult life.
人们在这一时期接受的教育内容和教育方式将会在很大程度上决定一个人在成年生活中对待事物的看法。
例句:Howthey will solve this serious problem has not been decided.
他们将怎样解决这个严重问题还没有决定。
例句:Whyhe did that wasn't quite clear.
他为什么做那件事还不十分清楚。
例句:Wholistens to wisdom will live in safety.
谁能听进智言,谁就会平安无恙。
以上就是小编为大家整理的关于AEIS语法考点主语从句要点总结,希望对大家有所帮助。更多AEIS考试查询、AEIS数学题目等问题可以咨询我们。
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