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Yes, she does No, Mary doesn’t Yes, I havE. Yes, I do.
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Yes, they are They are Yes, they' re They aren't
a lot of books were bought by Mary’s mother Mary’s father helped her with her lessons Mary worked hard at her lessons around the clock Mary’s classmates helped her a lot
an; the a; the the; the an; an
Yes, I’m Mary. Yes, you can speak. Speaking. Who are you?
for , for as , as for , as as , for
Yes, she has No, she hasn’t Yes, she did No, she didn’t
does; buy has; bought had; bought did; buy
had bought have had have bought