You ________ _________ if you want better grades. (study)
should study
She _____ _____ _____ yes, but she wasn't ready to get married. (say)
could have said
He wasn't at the meeting. _______ he _____ _____ about it? (forget)
Could---have forgotten
I _____ _____ _____ too much last night. (drink)
must have drunk
Wow, that _____ _____ _____ ! (hurt)
must have hurt
They _____ _____ _____ a great time. (have)
must have had
I guess he _____ _____ _____ late for his flight. (be)
must have been
That animal is too small. It _____ ______ an elephant.
can't be
Why is she late? She _____ _____ ______ in traffic right now. (stuck)
may/might/could be
I'm not sure, but I _____ _____ _____ my wallet. (lose)
may/might have lost
She can't find her mobile phone. It _______ _____ at the office.(be)
may/might/could be
You _____ _____ _____ the movie. It was so boring that you fell asleep. (like)
couldn't/ can't have liked
I really _____ _____ _____ so much. (eat)
shouldn't have eaten
You ______ ______ ______ her. She was away on vacation. That was someone else. (see)
can't/couldn't have seen
The cat _____ _______ _____ hurt. (get)
may/might/could have gotten/got
He _____ _____ _____ tired after cleaning the entire house. (be)
must have been.
He _____ _____ _____ to impress her. (want)
must have wanted
They _____ _____ ______ first. (call)
could/should have called.