助动词本来就是来表示时态的。一般现在时是do,过去式是did,将来时是will do。那么紧跟后面的动词就要用原型。
当然有啦,比如 I don't want to eat it. 比较 I didn't want to eat it yesterday. 或 I will (am going to ) eat it later.
等等
被协助的动词称作主要动词(main
verb)。助动词自身没有词义,不可单独使用表示时态,例如:
he
is
singing.
他在唱歌。
he
has
got
married.
他已
动词一般都用原型啊
因为助动词以表明时态了啊
you needn't finish your homework
you can smoke here.
貌似只是一般现在时把?