sleep完成時態為have slept
例句
1、
He can't have slept through all that noise.
他不可能在那種鬧哄哄的環境裏睡好覺。
2、
I must have slept in an awkward position ─ I'm aching all over.
我肯定睡的姿勢不舒適——我全身疼痛。
3、
She must have slept for a time.
她是必須睡一下了。