动词不定式与疑问词连用 疑问代词who, what, which和疑问副词when, where, how, why等后面可以接动词不定式.构成动词不定式短语.可以在句子中作主语.宾语.表语等成分. 例如:(1) He doesn’t know how to use the machine. (2) How to use the machine is a question. (3) The question is when to go there. (二)动词不定式的时态和被动形式 动词不定式是非谓语动词的一种.由不定式符号(to)加动词原形构成.不定式的形式有五种: 【查看更多】
