这件蓝外套前天洗过了。

The new door won't lock easily. (表属性、特征)

新门不好锁。

The new door was locked by the little boy. (表动作)

新门被这个小男孩锁上了。

4. 当need, want, require等谓语动词前的主语与其后的非谓语动词构成逻辑上的动宾关系时，非谓语动词可以用不定式的被动式，也可以用动词-ing形式的主动式表被动含义。如：

The old house needs repairing / to be repaired.

The flowers want watering / to be watered every day.

5. 形容词worth后接动词-ing形式的主动式表被动含义。如：

The book is well worth reading.

The question isn't worth answering.

6. 某些表示"发生(happen / take place / occur)"、"爆发(break out / burst out)"和"传播(spread)"的不及物动词，没有被动语态。如：

The news that a famous singer would give a show spread quickly.

7. 由"动词+名词+介词"构成的短语动词，如：pay attention to, take care of, make use of等，用于被动语态时，通常将整个短语动词当作一个及物动词处理，也可将其中的名词提前作主语构成被动语态。如：

These little trees are taken good care of.

= Good care is taken of these little trees.

Time should be made good use of to learn English.

= Good use should be made of time to learn English.

8. 使役动词have, make等以及感官动词see, watch, notice, hear, feel, observe等后接不定式作补足语时，主动结构中用不带to的不定式，被动结构则用带to的不定式。如：

My mother often makes me wash my clothes.

= I'm often made to wash my clothes.

I saw the teacher go into the classroom.

= The teacher was seen to go into the classroom.