must not 后面加do doing 还是to do?

来源：学生作业帮助网 编辑：作业帮 时间：2024/05/27 01:49:49

must not 后面加do doing 还是to do?
must not 后面加do doing 还是to do?

must not 后面加do doing 还是to do?
直接加do must 是情态动词 后面只能接动词原形

do