Topics: Verb Ability
Which sentence correctly uses ‘be able to’ in the past tense?
A. I am able to solve the problem yesterday.
B. I was able to solve the problem yesterday.
C. I will be able to solve the problem yesterday.
D. I have been able to solve the problem yesterday.
Select your answer:

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Tenses › ViewChoose the best answer to complete the following answer:
While Trish ___ the living room, she heard a strange noise in the kitchen.
A. has cleaned
B. was cleaning
C. cleaned
Modals › View
I __________ get up early today. I have to go the doctor at 8 o’clock
A. Must
B. Mustn’t
C. Have to
D. Don’t have to
