i'm sorry to have kept you waiting for a long timewaiting可以不加ING吗?为什么?

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/19 12:38:53
i''msorrytohavekeptyouwaitingforalongtimewaiting可以不加ING吗?为什么?i''msorrytohavekeptyouwaitingforalongtime

i'm sorry to have kept you waiting for a long timewaiting可以不加ING吗?为什么?
i'm sorry to have kept you waiting for a long time
waiting可以不加ING吗?为什么?

i'm sorry to have kept you waiting for a long timewaiting可以不加ING吗?为什么?
不能 keep sb doing sth 是固定用法