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He
sing
is
ing.
Listen!
Look!
They
are
play basketball.
ing
They
danc
are
at this monment.
ing
e
They are running now.
The boy is swimming now.
Listen！He is singing.
Look! They are playing basketball.
They are dancing at this moment.
She is reading now.
He is writing a book these days.
Read and Think!
现在进行时的含义与结构:
含义： 1、现在（说话的瞬间）正在进行或发生的动作，强调“此时此刻”。
2、当前一段时间内的活动或现阶段正在进行的动作（持续性）。
标志词：now, at this moment, listen, look,…
结构：be (not) + V-ing