Question

leave做使役动词这个词做使役动词讲时,用不定式时是加上to的,其他的比如see,watch只是在变成被动时加to对吗

Answer 1

sound ,look,smell,taste,feel 这些词都是系动词,后面要接表语.例如,She looks sad.It sounds good.The chicken smells good .

see sb doing sth 中doing是现在分词做宾语补足语.see sb do sth 中do sth 是省略to的动词不定式做宾语补足语.