Topics: Perfect Modals
Patty ____________been at the mall last night. She was out of town visiting her mother.
A. couldn’t have
B. must have
C. mustn’t have
D. could have
Select your answer:
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Verb Tenses › ViewWhich tense is used to describe an action that happened at an indefinite time in the past?
A. Present perfect
B. Simple past
C. Future perfect
D. Past continuous
Grammar › View
You can use my phone if yours _______.
A. don’t work
B. doesn’t work
C. not to work
D. not working