Question

怎样使用动词不定式的被动语态

Answer 1

不定式的逻辑主语通常是句子的主语,如果不定式有自己的逻辑主语,它通常由for或of引起.
动词不定式的一般式表示它与谓语动词同时或之后发生；其完成式则表示发生在谓语动词之前的动作.但要注意动词：plan, expect, intend, wish, mean, want, suppose, would (should)like等后面的不定式完成式则表示原打算要做而最终未做成的事情.
当不定式的逻辑主语是动作的承受者时,这个不定式要用被动式,包括它的一般式和完成式
动词make, let, hear, watch, see, feel, help等后面做宾语补足语的不定时一般不带to,如：
The strange thing made me feel thirsty. 这个奇怪的东西是我感到口渴.
I heard her move about in her room upstairs last night.
昨晚我听到他在楼上房间里走来走去.
Did you see Jack take away the magazine? 你看到Jack拿走了那本杂志了吗?
当以上所列的谓语动词改为被动语态时,后面的不定式需带to.如：
He was heard to move about in her room upstairs last night.
昨晚听到他在她的房间里走来走去.
Was Jack seen to take away the magazine? 诱人看到 Jack拿走了那本杂志了吗?
（let, feel和少用于被动语态）

Answer 2

动词不定式有两种被动语态形式：

 一般式to be done
完成式to have been done

 例： The next thing to be done is to carry away the earth.

  No harm seems to have been done.

Answer 3

学费诽倮对于两旨