3. 主语从句不可位于句首的五种情况
(1) if 引导的主语从句不可居于复合句句首。
(2) It is said , (reported) …结构中的主语从句不可提前。例如:
It is said that President Jingo will visit our school next week. (right)
That President Jiang will visit our school next week is said. (wrong)
(3) It happens…, It occurs… 结构中的主语从句不可提前。例如:
It occurred to him that he failed in the examination. (right)
That he failed in the examination occurred to him. (wrong)
(4) It doesn't matter how/whether …结构中的主语从句不可提前。例如:
It doesn't matter whether he is wrong or not. (right)
Whether he is wrong or not doesn't matter. (wrong)
(5) 含主语从句的复合句是疑问句时,主语从句不可提前。例如:
Is it likely that it will rain in the evening? (right)
Is that will rain in the evening likely? (wrong)
4. What 与that 在引导主语从句时的区别
What 引导主语从句时在句时在从句中充当句子成分,如主语。宾语。表语,而that 则不然。例如:
1) What you said yesterday is right.
2) That she is still alive is a consolation.
二。宾语从句
宾语从句就是在复合句中作宾语的名词性从句,通常放在主句谓语动词(及物动词)或介词之后。
1. 作动词的宾语
(1) 由that引导的宾语从句(that 通常可以省略),例如:
I heard that be joined the army.
(2) 由what, whether (if) 引导的宾语从句,例如:
1) She did not know what had happened.
2) I wonder whether you can change this note for me.