小学英语语法之肯定句
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    其实,小学英语的学习中也有语法的部分,当然小学英语语法的掌握绝不可死记硬背,更多的是以背诵为主,让学生们在潜移默化中掌握语法规则,下面是小编整理的关于小学英语语法之肯定句的资料,希望对你有所帮助!

     

    1. be动词的否定式

    be 动词根据不同的人称和时态有不同的形式,在一般现在时中是am , is , are可用作联系动词,构成否定式时,一律在其后面加否定词not.

    He is reading. --- He is not reading. They are from China. --- They are not from China.

    2. 情态动词的否定式

    情态动词的否定式是在其后面直接加not. 如:

    I can swim. --- I can’t swim. He can dance. --- He can’t dance. You should go to school at seven. --- You shouldn’t go to school at seven.

    3. 实义动词的否定句

    实义动词变否定句时,要借助助动词do , does,在一般现在时中用do或者does其句子结构为:主语+ don’t / doesn’t + 动词原形+其它 例如:

    I like pop music. --- I don’t like pop music. He likes running. --- He doesn’t like running.

    She does her homework at home. --- She doesn’t do her homework at home

     

    肯定句的概念:

    句子中不含否定词的就称为肯定句。肯定句的基本结构为:主语+谓语,陈述句的肯定形式分两种,一种为正常语序,一种为倒装语序。

    例如:I have heard a lot that way.

    In front of the car was Mike.

    用于肯定句的常见结构:

    1、already:

    在通常情况下,already(已经)主要用于肯定句,一般不用于否定句或疑问句。

    如:误:He hasn' tarrived already.

    正:He hasn't arrived yet. 他还没有到。

    :有时用于否定句或疑问句中,主要表示惊讶。

    如:Is he back already? 他怎么就回来了。

    Haven't you seen him already? 难道你还没见到好?

    2、excellent:

    excellent意为“极好的”,含有绝对无疑的意思,通常只用于肯定句,不用于否定句。

    如:误:The film is not excellent.

    正:The film is not very good. 这部电影不是很好。

    :excellent通常也不用于疑问句、条件句等。

    3、hurry up:

    hurry up主要用于肯定句(尤其是肯定的祈使句),一般不用于否定句。在否定句中,用hurry即可。

    如:误:Don't hurry up; we have enough time.

    正:Don't hurry; we have enough time. 别急,我们有的是时间。

    4、plenty(of):

    在通常情况下,plenty(of)用于肯定句中,而不用于否定句中。

    如:误:Have you plenty of food for the holidays?

    正:Have you enough food for the holidays? 你有足够的食物供假期里吃吗?

    :在否定句或疑问中用enough, much, many等代之。具体地说,疑问句中通常用enough代替,否定句中通常用much,many代替。

    比较:There is plenty of time. 时间还很多。

    There isn't much time. 时间不多了。

    Is there enough time? 时间还够吗?

    5、some:

    在通常情况下,some用于肯定句中,在否定句或疑问句中要用any代之。

    如:误:I haven't some question to ask.

    正:I haven't any question to ask. 我没有问题要问。

    :some有时也用于否定句,那多半有某种特殊的原因。

    比较:I don't like any of the books. 这些书中我一本也不喜欢。

    I don't like some of the books. 这些书中有几本我不喜欢。

    I don't like some one of the books. 这些书中某一本我不喜欢。

    另外,some有时也可用于疑问句,如希望得到肯定回答的疑问句,或表示请求或建议等。

    如:May I have some paper? 我可以拿些纸吗?

    Why not give her some flowers? 为什么不给她送些花呢?

    表示“也”的副词also, too, as well通常不用于否定句,而主要用于肯定句或疑问句。

    如:误:I don't like the film too.

    误:I don't also like the film as well.

    误:I don't like the film as well.

    正:I don't like the film either. 我也不喜欢这部电影。

    :also和too有时可用于肯定句后所接的否定句中,表示“没有也……”。

    如: Heleftbutshedidn’talsoleave.他走了,但她没有也一起走。

    He bought a computer, but she didn't too. 他买了台电脑,但她没有也买台电脑。

    另外,在正式文体中,also, too有时可用于否定词之前。

    如:I also don't like it. 我也不喜欢它。

    I, too, have never met anyone like him.我也是,没见过和他一样的人。

     

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