1.改正：He succeeded in the competition,which made each of us happy.
或：He succeeded in the competition,making each of us happy.
不能用兩個動詞同時做一個簡單句的謂語.
要么把句子變成復(fù)合句,要么把某個動詞變成非謂語形式.
2.改正：The problem is that more and more young people are getting into the habit of smoking.
表語從句的that不能省略.
3.改正：Whether he is an engineer is unkown.
主語從句的“是否”只能用whether,不能用if.
4.改正：What she wants to know is whether she should attend the conference.
表語從句的“是否”用whether,不能用if.
5.改正：At the meeting he raised a question whether the project would be cancelled.
同位語從句的“是否”用whether,不能用if.
6.改正：It depends on whether it's going to rain.
介詞后的賓語從句的“是否”用whether,不能用if.
7.改正：We expressed the hope that the Browns would come to China again.
同位語從句的引導(dǎo)詞t不用which用that.
8.改正：The reason why he failed in the exam was that he was too careless.
用表語從句來解釋原因時,引導(dǎo)詞用that,不用because.
9.改正：Whoever comes to visit the exhibition is welcome.
no matter不能引導(dǎo)主語從句,但是whoever可以.
10.改正：What he needs is enough time and what I need are enough books.
what引導(dǎo)的主語從句,動詞的數(shù)應(yīng)該根據(jù)事實(shí)來判斷.