盾构始发井设计:英语辨析

来源:百度文库 编辑:杭州交通信息网 时间:2024/05/06 05:10:44
have sb to do
have sb doing
have sb do的区别啊

have sb to do 要某人去做
have sb doing要某人正在做/不停的做
have sb do要某人做了。

楼上的说得对