A.引导宾语从句，位于及物动词后

B.引导宾语从句，位于介词后

C.引导宾语从句，放句首

D.引导表语从句，主语从句或同位语从句

whether: A, B, C, D

if: A

2)What\that的区别

I. I think that it is unnecessary for me to speak louder.

II. His mother is satisfied with what he has done.

III. That he was able to come made us happy.

IV. This is what makes us interested.

V. The reason was that Tod had never seen the million-pound note before.

所引导的从句中是否缺主语、表语或宾语 汉语意义 能否省略

What 缺 什么；所......的东西、事情 否

that 不缺 无意义 宾语从句中能省略

3）who\whoever; what\whatever的区别

I. The spoken English competition is coming. Who will attend the meeting hasn't been decided yet.

II. I believe whoever takes part in the competition will try his best.

III. Can you tell me what you would like to order?

IV. Whatever happens, don't be surprised.

V. All the food here is delicious. Just order whatever you like.

名词性从句 让步状语从句

Who 表示"谁" /

Whoever 表示"...的任何人" 表"不论谁"

What 表"什么，所...的东西、事情" /

Whatever 表"...的任何东西" 表"无论什么"

4)常见的it作形式主语的结构

I. It is a fact that he won the match.

II. It is necessary that we do study the English.

III. It is known to all that light travels in straight lines.

IV. It seemed that he would come here.

基本句型结构 常用词语

It is + 名词 + that从句 It is a fact/a shame/a pity/no wonder/good news/...that...

It is + 形容词 + that从句 It is necessary/strange/important/possible/likely/...that...这类主语从句中,谓语动词常为(should)+动词原形

It is + 过去分词 + that从句 It is said/reported/decided/known/...that...

It + 不及物动词 + that从句 It seemed/happened/doesn't matter/has turned out/...that...

Step 4 Practice

1)Exs.3&4, Students Book P5

2)Make sentences using noun clauses as the subject, object, predicative and appositive.