[ Past form of Modals ]
The fishes had died. I’m sure he forgot to feed them.
A. He must have forgot to feed the fishes.
B. He should have fed the fishes.
C. He needn’t have fed the fishes.
D. He might have forgot feeding the fishes.

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A. In contractions and homophones
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This is David. _______ is twelve years old.
A. I
B. You
C. He
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