3. Maybe she will come here tomorrow. (POSSIBLE) 4. Lily cleaned the house, but her mother had cleaned it before. (NEEDN'T) -> 5. He had a lot of homework to do but he did not do them. (SHOULD) -> 6. I would have been able to finish the report if I had had more time. (COULD -> 7.I'm sure they haven't called yet. (CANT)

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