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一般现在时的结构

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【一般现在时的结构】1、主系表(名词、形容词、介词短语)
be动词的一般现在时有三种形式，即：am, is, are 。
肯定句
I am a middle school student. 表身份（表语为名词）
I am really tired. 表状态（表语为形容词）
I am from Korea. 表处所 （表语为介词短语）
否定句：系动词后加 not
一般疑问句：系动词置于主语前，句号变问号 。
缩写: we are = we're they are = they're
you are = you're aren't = are not
he is = he's my mother is = my mother's
isn't = is not that's = that is
注意：This is不可缩写 。 am not不缩写 。
2、主谓宾
肯定句式: 主语+动词原形/动词的第三人称单数+其他
I want to see you.
Bill often goes to school at 7:00 in the morning .
否定句式: 主语+（助动词）don't/doesn't +动词原形+其他
I don't want to see you.
Bill doesn't often go to school at 7:00 in the morning.
一般疑问句式: Do/Does+主语+动词原形+其他?
简略回答: (肯)Yes, 主语+do/does (否)No, 主语+ don't/ doesn't
缩写形式: don't = do not doesn't = does not
Do you want to see me? Yes, I do. /No, I don't
--Does Bill often go to school at 7:00 in the morning?
--Yes, he does. /No, he doesn't.

一般现在时的结构

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一般现在时

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