(1) 由where 引导
例：The suggestion where we should build our new factory should be
considered. 那个我们应该在哪儿建造厂房的建议应该给予考虑。
(2) 由what引导
例：I have no idea what he did. 我不知道他做了什么。
(3) 由whether 引导
例：The question whether he'll attend the meeting is not decided.
他是否会参加会议这个问题还没决定。
(4) 由who引导
例：The question who will go abroad needs considering.
谁将去国外这个问题需要考虑。
(5) 由when 引导
例：I have no idea when they will be back and settle down.
我不知道他们什么时候回来定居。
(6) 由that 引导
例：The suggestion that the students should have plenty of exercise is very
good. 学生应该有很多练习，这个建议不错。
(7) 由how 引导
例：He can't answer the question how he got the money.
他是怎样得到那钱的，他不能回答这个问题。
(8) 由why 引导
例: We don't understand the problem why this is the best choice.
我搞不懂这个问题，为什么这是最好的选择。
