現(xiàn)在進(jìn)行時(shí)

標(biāo)志：be + 動(dòng)詞的現(xiàn)在分詞

1. 表示說話時(shí)正在進(jìn)行的動(dòng)作：

She is writing a letter upstairs.

Who are you waiting for?

It is raining hard.

2. 表示現(xiàn)階段一直在進(jìn)行的動(dòng)作(說話時(shí)動(dòng)作未必正在進(jìn)行)：

I hear Mr. Green is writing another novel.

3. 表示反復(fù)出現(xiàn)或習(xí)慣性的動(dòng)作，往往包含說話者贊揚(yáng)、責(zé)備、厭惡等情緒，通常與always, constantly, continually, forever等頻度副詞連用。如：

John is forever asking silly questions like a stupid.

He is always thinking of others first.

4. 表示將來

1) 表示按計(jì)劃、安排將要發(fā)生的動(dòng)作，僅適用于部分趨向動(dòng)詞(如go, come, leave, start, arrive等)。如：

Uncle Wang is coming.

They're leaving for Beijing.

2) 在時(shí)間和條件狀語從句中，現(xiàn)在進(jìn)行時(shí)表示將來某時(shí)正在發(fā)生的事情。如：

Please drop in when you are passing my way.

If he is still sleeping, don’t wake him up.

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