yhe has already done the work
yhe children are reading now
she was sleeping bor 2 hours yesterday
am drank coffe last night
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1)Has she already done the work?She han't already done the work2)Are the children reading now?The children aren't reading now3)Was she sleeping for 2 hours yesterday?She wasn't sleeping for 2 hours yesterday4)Did you drink coffee last night?I didn't drink coffee last night