重点短语 重点句型 重点单词 She didn’t know which bus to take.她不知乘哪路公共汽车。(作动词的宾语) We must first solve the problem of whom to serve.我们必须首先解决为谁服务的问题。(作介词的宾语补足语) When to start remains undecided.何时出发,尚未决定。(作主语) The difficulty for us is how to do the most of work with the least of money.于我们而言,困难是如何花最少的钱办最多的事。(作表语) 这种结构相当于一个名词性从句,不论它在句子中作什么成分,常常都可用同等成分的从句来替代。改为从句时只要在疑问词后面添加一个适当的主语并将不定式动词改为适当形式的谓语动词即可。所以上述几句可分别改成: She didn’t know which bus she should take. We must first solve the problem of whom we should serve. When we should start remains undecided. The difficulty is how we ought to do the most of work with the least of money.
重点短语 重点句型 重点单词 当这种结构作宾语时,常常置于show,find out,learn,teach,tell,advise,wonder,know,discuss,remember,forget,explain 等动词或动词短语之后。 The teacher showed us how to read a book.老师指导我们怎样读书。 You’d better find out where to put these pens.你最好了解一下应该把这些钢笔放在哪里。 ◆现学活用 用“疑问词+不定式”改写下列句子 1.How we should do it was discussed last night. →How to do it was discussed last night. 2.I didn’t know where I should go. →I didn’t know where to go. 3.The difficulty was how we should cross the river. →The difficulty for us was how to cross the river .
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