一、疑问词+不定式的构成：由疑问代词who, whom, what, which; 疑问副词when, how, where等+不定式构成。Choosing what to eat is no longer as easy as it once was. 选择吃什么,已经不像以前那么简单了。How to describe people is todays topic. 如何描述人物是今天的话题。二 、疑问词+不定式的功能：在句中可作主语、宾语、表语等成分。1.作主语How to give advice in English is what I am trying to learn. 我正在努力学习如何用英语提建议。2.作宾语作动词的宾语We have to start somewhere if we want to learn how to write plays. 我们要学习写剧本，总得有个开头。作介词的宾语We had better learn to make the right choices about what and h
