复习课之---现在进行时Let’ssing.Whatareyoudoing?Whatareyoudoing?Iamsinging.Iamdancing.Whatareyoudoing?Whatareyoudoing?Wearereading.Wearestudying.Let'schant.I用am,you用are,is跟着他她它。单数名词要用is,复数名词要用are。Whatareyoudoing?IamwatchingTV.Whatishedoing?Heisplayingbasketball.Whatisitdoing?It’sflyingakite.Whatishedoing?Heisswimming.Whatarethebirdsdoing?Theyareflying.Ishedancing?No,heisn’t.Heissinging.Aretheboysplayingfootball?Yes,theyare.
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