动词时态句型: 现在进行时

现在进行时通常用于表示正在进行的动作或正在发生的事。

1. 现在进行时的肯定形式为: is/are/am + 现在分词。
He is reading the newspaper. 他正在看报纸。
It's raining. 在下雨。
They're waiting for the New Year. 他们正等待新年的到来。
They are playing in the garden. 他们正在花园里玩。
I'm doing my homework. 我正在做作业。
I am having some trouble with my roommates. 我和室友们发生了些矛盾。

2. 现在进行时的否定形式为: is/are/am + not + 现在分词。is not 可以缩写为 isn't, are not 可以缩写为 aren't。
She isn't talking to me now, because she is still angry. 她现在不和我讲话，因为她还没消气。
If you are not using the lights, please turn them off. 如果你不用灯的话，请关掉。
Scientists aren't just trying to make robots look like people. 科学家的努力不仅仅是要让机器人看起来像人。
He's not lying. He is telling the truth. 他没说谎。他说的是真的。

3 一般疑问句的句式如下:
Are you still working on the same task? 你还在做同一项任务吗？
Is he traveling in Beijing? 他正在北京旅行吗？
Am I doing the wrong thing? 我是不是正在犯错误？

4 特殊疑问句的句式如下：
Whom are you writing to? 你在写信给谁？
How are you feeling now? 你现在觉得怎样？
Who is making all that noise? 是谁在制造那些噪音？
Why is Tina standing in the front of classroom? 蒂娜为什么站在教室前面。
Why aren't you wearing a coat? It's very cold. 天气很冷，你怎么不穿大衣？

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