关于英语各种从句改为主语从句 ..其偶帮助

Whether we are going shopping today depends on the weather （Whether 引导主语从句）

It suddenly occurred to me that I wanted to travel to Europe  （that 引导主语从句，it 是形式主语）楼主的句子有错误，漏了want的-ed，后面还漏了to

It doesn't matter to me whether she is please or not （Whether 引导主语从句，it 是形式主语）

where引导主语从句：

where he comes from is unknown 他从哪里来还不清楚。

where宾语从句：

i want to know where he comes from 我想知道他从哪里来。

which引导定语从句：

the city which i want to visit is Dalian 我想参观的城市是大连。

where引导表语从句：

the question is where he comes from 问题是他从哪儿来。

主语从句在复合句中作主句的主语,引导主语从句的词有从属连词that, whether以及连接代词who, what, which, whoever, whatever, whichever和连接副词when, where, why, how等例如:

1、That she was chosen made us very happy她当选了使我们很高兴

2、What caused the accident is a complete mystery是什么导致了这次事故还完全是一个谜

3、Whether she will come or not is still a question她是否来还是一个问题

4、Which team will win the match is still unknown哪个队会赢得这场比赛还不知道

5、Whoever comes to the party will receive a present参加聚会的每一个人都将收到一份礼物

6、When they will start has not been decided yet他们何时出发还没决定

注意:上述例句中的主语从句都是放在句首,但有时为了使句子结构平衡,避免"头重脚轻",常用it作形式主语,而把从句放在后面例如:

It is a pity that she has made such a mistake她犯了这样一个错误,真是遗憾

It depends on the climate whether they are going shopping today他们是否今天去购物还得看天气情况

这样就构成了下面一些常用句型:

1)It is + adj / n +从句

It is a pity/shame that遗憾的是……

It is possible that很可能……

It is unlikely that不可能……

2)It +不及物动词+从句

It seems/appears that似乎……

It happened that碰巧……

3)It + be +过去分词+从句

It is said that据说……

It is known to all that众所周知……

It is reported that据报道……

It is believed that据信……;人们相信……

It is suggested that有人建议……

It must be pointed out that必须指出……

It has been proved that已证明……例如:

It is believed that at least a score of buildings were damaged or destroyed据信,至少有二十座楼房遭到破坏或彻底毁掉

It is suggested that the meeting should be put off有人建议会议延期召开

It's reported that three people were killed in the accident and five were hurt badly据报道,事故中三人丧生,五人重伤

It is known to all that Taiwan is an inseparable part of China众所周知,台湾是中国不可分割的一部分

扩展资料

宾语从句用以区分 主语从句的几个特征：

1、 引导词：what\which\whose\when\whether\if\where

2 语序：宾语从句必须是用陈述语句。（名词性从句都是陈述语序）

如：I think that you must work harder

宾语从句的引导词、 连接词的区别、 否定转移等现象。

补充： 从句的语序永远是 陈述句。

5 That they should hold an English evening on the weekend was suggested

6That he didn't pass the College English Test Band 4 is a pity

7Do you think it possible that you will finish the work in three days

8What he needed most was more time

第一个问题：不是的。除了有疑问代词who,that,which外，还有疑问副词when，where，why，how等。如:1 Whether he will come is unknown2How this happen is not clear3That she was able to come made us very happy（此句中That位于句首无实义不充当成分但不可省）

主语从句在句中作主语。可放在主句谓语动词前，但多数情况由it作形式主语，而把主语从句放在主句之后。此题正是如此。whatever引导的后面整部分为主语，remains系动词，后接形容词unknown构成系表结构。

原句等于Whatever will happen if we fail to protect our cultural heritage remains unknwon这样看起来显得头重脚轻，故当以it作形式主语。类似的有It is strange that you should（此句中shoule意为“竟然”） like him(=That you should like him is strange)

It remains unknown whatever will happen if we fail to protect our cultural heritage 整个句子是包含一个状语从句的主语从句,if we fail to protect our cultural heritage是一个由if引导的条件状语从句

That she was able to come made us very happy当主语从句不缺少任何成分时,引导词也不具有某中意义,就是以that开头的,此句中That位于句首,无实义,不充当成分,且不可省(引导主语从句连词都不可省)

（20091118补充）

啊……～～还好我来上网，不然美办法用手机修改问题……

楼主以后提问尽量一次说完啊～有时候没注意到呢。

是这样的，（要说来话长了），复合句包括主句和从句，而有连接词引导的通常是从句，所以It remains unknown是这个句子的主句，也就是主干(包含了主语谓语宾语，一个简单句)，其实从句都是充当补充说明作用的，以便更好的表示主句意思和修饰主句，没有后面的从句，主句的意思句子依然完整，只不过仅是个包含主谓宾的简单句而已。而有从句的句子就是一个复合句了。

其实复合句分为名词性从句、定语从句、状语从句3大类。而主语从句、宾语从句、表语从句和同位语从句在句子的作用相当于名词，所以这4种从句又归类于名词性从句。这样一来，复合句就有主语从句、表语从句、宾语从句、同位语从句、定语从句和状语从句6类。

根据中文译意，虽然if we fail to protect our cultural heritage是一个由if引导的条件状语从句，但是它和前面的whatever will happen连在一起是个整体，指某一件事，整个部分相当于一个名词（所以才用it作形式主语的），故而应该把whatever will happen if we fail to protect our cultural heritage作为本题的整个句子的从句，以此断句，故定性为主语从句。想象一下，如果这是个状语从句，那么，去掉if状语从句以后，前面的意思说得通吗？显然，那样就不是一个简单句了。

另外，是的，That she was able to come made us very happy=It made us very happy that she was able to come也是同样的，象前面所说，当that引导的主语从句太长,避免头重脚轻，常用it作形式主语而把that从句放在后面（可是she was able to come不觉得很长啊～无所谓啊呵呵）。

o_o 汗……分析一个句子真是不简单 ～网上多搜搜有关每种类型从句的例题，有用呢！

建议楼主把复合句这一块看得很熟练，以后再遇到什么问题，基本上多看看就迎刃而解了。。

呵呵如果还有什么问题可以百度Hi我。不过我不知道什么时候才看到哦～～

祝进步！