2) 在need, require, want, be worth , deserve等词的后面,动名词用主动形式表示被动意义
The TV needs repairing. 电视需要修理。
= The TV needs to be repaired.
3) 一般说来,不及物动词或不及物动词短语不能使用被动语态,常见的有:appear, die, disappear, end(vi. 结束), fail, happen, last, lie, sit, spread, stand, break out, come true, fall asleep, keep silence, lose heart, take place,occur等。
A car accident happened in the street.
Great changes have taken place in my hometown.