The meeting was supposed to take place on Tuesday,but we've
The meeting was supposed to take place on Tuesday,but we've had to postpone it.
but we've had to postpone it.
have had to
这与have to 有什么区别？have had to 是have to 是过去完成时形式么？
but we've had to postpone it.
have had to
这与have to 有什么区别？have had to 是have to 是过去完成时形式么？
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你能帮帮他们吗