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1、現(xiàn)在進行時
表示動詞在此時正在發(fā)生或進行就使用進行時態(tài)，結構為sb be v-ing sth + 其它.
I’m playing baseball. Are you playing baseball? I’m not playing baseball.
Nancy is writing a letter. Is Nancy writing a letter? Nancy isn’t writing a letter.
They’re listening to the pop music. Are they listening the pop music? They aren’t listening to the pop music.