Question

英语中，关于主语从句的几道选择题？

1.It is usually_____what a little child says is truth.
人们通常认为小孩子说的是真话。
a.thought b.think that c.thought that d.think
正确答案：c. (It is +被动）

请问为什么选c，老师说这道题是，从句套从句，我没看出来是什么从句。

2.It _____him that he had forgotten to lock the door when he left home.
他突然想起他离家时忘了锁门。
a.occurs to b.occurred to c.is occurred to d. is occurring
正确答案：b. （It +不及物）

为什么选b

3._______ a spoonful of soil can tell us so much about the structure and early history of the moon.
值得注意的是，一勺泥土能告诉我们这我么多关于月球结构和早期历史的信息。
a. remarkable b. quite remarkably c. it is remarkable that d. it is remarkable
正确答案：c. (It is +adj)

请问为什么选c，谢谢。

Answer 1

1. 主句被动，宾从的引导词that不能省略，所以选C。
2. it occurred to sb. 是搭配，所以选B。
3. 形式主句后面的真正主语从句，引导词that不能省略。it...that是固定搭配。

追问

你好，第1句和第2句还原的话，是怎样的？谢谢。

追答

你是指被动变主动吗？第一句可以说People think what a child says is true.

第二句等it occurred to sb. 意思，某人突然想到，不存在复原，只能换一种表达，比如He suddenly thought/realized that...

追问

It occurred to_him that he had forgotten to lock the door when he left home.
第2句是主语从句吗？

追答

可以看成主语从句，用it代替它。

但that从句不能放在前面，因为it occurred to sb. 已经成为一个固定句型了

追问

1. It is usually thought that what a little child says is truth.

可以这样改吗：

What a little child says is usually  thought truth.

因为是主语从句。

追答

可以啊，只是实际作用通常用形式主语it，否则主语太长，头重脚轻。
之所以放到后面，就是为了句子的协调。

严格地讲应该是That what....is true.

你这句话语法上可以(主语从句)，但意思或侧重点与原来的句子有些不同。

严格地讲，原来的句子意思是和语法上=That what a child says is usually thought to be true.