一.谓语动词用主动表被动

1. 一些连系动词(eg.look,sound,smell,feel,taste,prove) 要用主动形式表被动含义。

The table feels cold.      My advice proved to be wrong.

2.当open,close, shut ,lock, move 等用作不及物动词且与can't,won't等连用表示主语属性，常用主动表被动。    eg.The door won't open.

3.当read,wash,clean, cook,cut,wear, carry, record等用作不及物动词且与副词well ,easily ,slowly,quickly 连用表示主语属性.

 The book sells well.       The food doesn't cut easily.

4.某些表示开始和结束的动词（eg.begin,start,finish,end)主语为事物且不强调动作执行者。

 When does the concert  begin?

 The play ended at ten o'clock.

5.不及物动词及短语用主动表被动含义(eg.take place,happen,come about,break out,appear,disappear,last,arise,belong to)

    The war lasted 3 years.

6.表示静态动词（have,lack,fit,hold,suit)

  The hall holds 100 people.

   The shoes don't fit me.

二.非谓语动词主动表被动

1.不定式to blame, to let用作表语，用主动表被动。

  Who is to blame?

  The house is to let.

2.主语+be +adj +to do(不定式作状语且与主语构成逻辑上动宾关系）

 The text is easy to understand.

3.不定时作定语和所修饰的词构成动宾关系，且有句子主语来完成。

  I have  nothing to do.

4. be worth doing

  The film is worth seeing.

5.当want,need,require表需要时后加ving或者to be done.

 The plants  need watering/to be watered every day.

 This wall  requires repairing/ to be repaired.

6.在too.....to和.....enough to do句型中。

 The box is too heavy to carry.

  The boxes are not strong enough to use as a house.