现在进行时主要用于：
1 、表示现在或现阶段正在进行的动作。
e.g. Listen, someone is crying.
What are you doing these days?
2 、代替一般现在时，表示经常性动作或状态，而含有某种感情色彩。
e.g. How are you feeling today?
你今天感觉怎样?(显得亲切)
He is doing well in his lessons.
他的功课很好。(赞扬)
You are always boasting.
你老爱吹牛。(厌烦)
3 、动词 go, come, leave, arrive 等表将要发生的动作时。
e.g. They are leaving for Shanghai.
与这种时态连用的时间状语常有：
now, these days, recently, this week 等。
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