例句：
Her hair could have done with a wash.
她的頭發該洗一洗了。
I could have done without being woken up at three in the morning.
其實用不著在凌晨三點鐘就把我叫醒。
She was away from school for 15 weeks, a handicap she could have done without
她有15周沒上學，這給她帶來了本不該有的障礙。
Whoever could have done such a dreadful thing?
究竟是誰能干出這種可怕的事呢？
It was hard to visualize how it could have been done.
很難想象這是如何辦到的。