英文句子中什么遇到词语,动词要用原形?

问题描述:

英文句子中什么遇到词语,动词要用原形?
如:can,to 之类的

情态动词:can could may might must need ought to dare dared shall should will would
助动词:do did done
动词不定式:to+动词
差不多就是这些了,
(拒绝抄袭!)