we should have this letter to be sent.还是we should

问题补充：

we should have this letter to be sent.还是we should have this letter send.我觉得是第一种对,可是那是不是就说明have sth to do这种用法不对呢?

答案：

have sth to do :有一些事需要去做,这里的have是有的意思.

have sth done:有一些事被（别人）做,这里的have是助动词,没有意思.

eg:1.I have some clothes to wash.

2.Can you help me have the clothes washed?

所以,你的第一种用法是错的,应该是：we should have this letter to send.

第二种用法是正确的.

======以下答案可供参考======

供参考答案1:

we should have this letter send.是让别人来做

要看你想表达什么意思,自己做还是让别人做

have sth to do 是有事要做,不一样的用法

供参考答案2:

have sth to be done= have sth done