题目内容：

can you finish reading this book in five days
finish+doing sth,但can不是加动词原形吗

优质解答

can 后加动词原形,这句话陈述句就是：I can finish reading this book in five days.
所以说,can 后是加动词原形（finish）,而在finish后又接的doing形式,其实是两个固定搭配,而不是单纯的can的用法