PAST
EGP #1226 | B2 | MODALITY / could Can used 'could' have + '-ed'. Lexical range: N/A
你打电话来的时候,她可能已经睡着了。
She ___could ___have ___been asleep when you called.
那封邮件可能已经掉进你的垃圾邮件箱了。
The email ___could ___have ___gone into your spam folder.
他不可能拿了你的书——他上周一直在国外。
He ___couldn't ___have ___taken your book — he was abroad last week.
他们可能忘了这次会议——一个人都没来。
They ___could ___have ___forgotten about the meeting — nobody showed up.
那个噪音可能是从隔壁工地传来的。
The noise ___could ___have ___come from the construction site next door.