She is playing the piano now句子中playing不是动词吗?为什么还会有be,be不是在没有动词的时候使用吗?

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She is playing the piano now句子中playing不是动词吗?为什么还会有be,be不是在没有动词的时候使用吗?
She is playing the piano now句子中playing不是动词吗?为什么还会有be,be不是在没有动词的时候使用吗?

She is playing the piano now句子中playing不是动词吗?为什么还会有be,be不是在没有动词的时候使用吗?
is playing 是现在进行时,是一种时态.
参考：
1、
一、现在进行时的基本用法：
a. 表示现在（指说话人说话时）正在发生的事情.例如：
We are waiting for you. 我们正在等你.
b. 习惯进行：表示长期的或重复性的动作,说话时动作未必正在进行.例如：
Mr. Green is writing another novel. 他在写另一部小说.（说话时并未在写,只处于写作的状态.）
c. 表示渐变,这样的动词有：get, grow, become, turn, run, go, begin等.例如：
The leaves are turning red. 叶子在变红.
It's getting warmer and warmer. 天越来越热了.
d. 与always, constantly, forever 等词连用,表示反复发生的动作或持续存在的状态,往往带有说话人的主观色彩.例如：
You are always changing your mind. 你老是改变主意.

2、现在进行时的构成是:主语+be+v.ing〔现在分词〕形式
　　第一人称单数I+am+ing.
　　第一人称复数We+are+ing.
　　第二人称单(复)数 You+are+ing
　　第三人称单数 He（She,it）+is+ing
　　第三人称复数 They+are+ing
　　肯定句:主语+be（is/am/are）+现在分词
　　否定句：主语+be（is/am/are）+not+现在分词
　　一般疑问句:be（is/am/are）+主语+现在分词
　　特殊疑问句：特殊疑问词+相应be动词+主语+现在分词+Sth?
　　间接引语中改为过去进行时.

希望对你有所帮助,学习愉快!

now是现在进行时，现在进行时的句式是be+doing

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