常用的助动词有be, do, does, did, have, has, shall, will, would等。

英语中的助词分为语气助词和助动词。助动词就是协助主要动词构成谓语的动词。助动词本身没有词义，不可单独作谓语，只能和别的动词一起构成谓语，表示时态、语态、语气等，或表示疑问或否定。

do，does，did，done，doing

1、 be been being am are is was were ;

2， have has had having ;

3， shall will shoud would ;

4， do does did ;

这些助动词一般没有意义，主要帮助构成谓语，表示时态、语态、语气等。或构成疑问及否定形式。