因为cut是不规则动词，过去式和原形都是cut

cut的过去式：cut.

cut：v.切割割破划破(用刀等从某物上)切下.

扩展资料

The bus was cut in two by the train.

那辆公共汽车被火车撞成两截。

He's not cut out for teaching.

他不适于做教学工作。

He cut himself off from all human contact.

他断绝了与所有人的联系。