例句：
Her hair could have done with a wash.
她的头发该洗一洗了。
I could have done without being woken up at three in the morning.
其实用不着在凌晨三点钟就把我叫醒。
She was away from school for 15 weeks, a handicap she could have done without
她有15周没上学，这给她带来了本不该有的障碍。
Whoever could have done such a dreadful thing?
究竟是谁能干出这种可怕的`事呢？
It was hard to visualize how it could have been done.
很难想象这是如何办到的。