構(gòu)成：am/is/are (not) + being + V-過去分詞

用法：
1、表現(xiàn)正在進(jìn)行或發(fā)生的被動動作，常與now, look等詞連用。
e.g.She is being examined by the doctor now.
2、表示現(xiàn)階段或目前這段時間正在進(jìn)行的被動動作，但這一被動動作在此時此刻不一定正在發(fā)生。
e.g.A new factory is being built.
They are being taught English at present .

https://f1.hjfile.cn/file/201406/現(xiàn)在進(jìn)行時的被動語態(tài).ppt
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