现在进行时课件.ppt

one
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seventeen
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twenty-one
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thirty
thirty-one
thirty-two
thirty-three
thirty-four
thirty-five
语法专题现在进行时
现在进行时
现在进行时表示现在（即说话人说话的时刻）正在进行的动作或正在发生的事情，现在进行时的标志性词语有now, look, at the moment, listen等
现在进行时的基本构成：
主语+be动词+现在分词
Eg:
draw
are
ing
They
pictures.
现在进行时
现在分词的构成规则：
-ing，如：read-reading
，去e加-ing，如：write-writing
，末尾只有一个辅音字母，应先双写这一字母，再加-ing。
Eg：swim-swimming run-running
cut-cutting shop-shopping sit-sitting
现在进行时
现在进行时的句式：
—主语+be+doing
Eg: I am doing my homework.
—主语+be+not+doing
Eg: I am not doing my homework.
—be提到句首（注意人称变化）
Eg: Are you doing your homework?
现在进行时
What is he doing?
He is writing.
What is she doing?
She is reading.
现在进行时
What is he doing?
He is playing computer.
现在进行时
What is he doing?
He is playing basketball.
现在进行时
What is she doing?
She is drinking.