① 英语中肯定句怎么变否定句
你好,要想学好英语,你要不断积累,这样你就可以将英语学好。我帮你总结几点,供你参考,谢谢。
一、当肯定句的谓语动词是be或由be构成时,改为否定句,应在be后面加not。二、当肯定句的谓语动词只是行为动词时,改为否定句,要用“助动词do(does,did)+not+动词原形”。三、当肯定句的谓语是由“情态动词can,may,must等+动词原形”构成或由“助动词will,have,had等+动词原形(或动词的现在分词、过去分词)”构成,变否定句,要用“情态动词/助动词+not+动词原形(或动词的现在分词、过去分词)”构成。四、当肯定句的谓语是have时,分两种情况:1.当have作“有”讲时,变否定句的方法有:a.由have
+not
+其它;b.由have
+no
+其它;c.由
don't(doesn't,didn't)+have+其它。2当have既不当作“有”讲,也不是助动词,而是行为动词时,改为否定句,要用“助动词do,
does,did等+not
+have”构成。五、当肯定句中含有情态动词have(has)to时,改为否定句,有两种构成法,一种借助do,一种不借助do(仅限于现在时和过去一般时),多数人用第一种形式。六、当肯定句中含有too,also时,改为否定句,须将too,
also改为either。七、当肯定句中含有always时,改为否定句,须将always改为never。八、当肯定句中含有already时,改为否定句,须将already改为
yet。九、当肯定句中含有nearly时,改为否定句,须将nearly改为
hardly。
如果能对你有所帮助,我就高兴。
② 五年级英语肯定句变否定句
1. 动词be的否定式
动词be根据不同的人称和时态可以有am, is, are, was, were等不同形式,可用作连系动词(表示“是”、“在”等)和助动词(用于构成进行时态和被动语态等),但不管何种情况,构成否定式时,一律在其后加not:
I’m old, but you’re young. 我老了,但你还年轻。
→I’m not old, but you’re not young. 我还不老,但你不年轻了。
He was reading and I was writing. 他在读,我在写。
→He was not reading and I was not writing. 他没有在读,我没有在写。
2. 动词have的否定式
动词have根据不同的人称和时态可以有have, has, had等形式,可以用作实意动词和助动词,分以下情况讨论:
1. 用作实意动词表示状态,如表示拥有、患病或用于have to表示“必须”等,在构成否定式时可以直接在其后加not,也可根据情况在其前使用don’t, doesn’t, didn’t:
He has a car. 他有辆小汽车。
→He hasn’t a car. / He doesn’t have a car. 他没有小汽车。
He had some dictionaries. 他有一些词典。
→He hadn’t any dictionaries. / He didn’t have any dictionaries. 他没有词典。
You have to go with him. 你必须同他一起去。
→You haven’t to go with him. / You don’t have to go with him. 你不必同他一起去。
【注】have to构成否定式时以在其前加don’t等较为常见。
2. 用作实意动词表示动作,如表示“吃(=eat)”、“喝(=drink)”、“拿(=take)”、“收到(=receive)”、“度过(=spend)”等,构成否定式时不能直接在其后加not,而应根据情况在其前使用don’t, doesn’t, didn’t:
He had some cake for breakfast. 他早餐吃了些蛋糕。
→He didn’t have any cake for breakfast. 他早餐没有吃蛋糕。(不能用had not)
We had a good holiday. 我们的假期过得很愉快。
→We didn’t have a good holiday. 我们的假期过得不愉快。(不能用had not)
3. 用作助动词构成完成时态,其否定式只能在其后加not:
I have read the book. 我读这本书。
→I have not read the book. 我还没读这本书。
He had left when I arrived. 我到达时他已离开了。
→He hadn’t left when I arrived. 我到达时他还没有离开。
3、情态动词的否定式
情态动词的否定式一般在其后加not构成:
I can finish the work in an hour. 我能在1小时内完成这工作。
→I can’t finish the work in an hour. 我不能在1小时内完成这工作。
You must go with us. 你必须同我们一起去。
→You mustn’t go with us. 你不能同我们一起去。
We should help them. 我们应该帮助他们。
→We shouldn’t help them. 我们不必帮助他们。
4、实意动词的否定式
一般实意动词的否定式,通常应根据不同时态和人称在实意动词之前加don’t, doesn’t, didn’t等:
He works in a bank. 他在一家银行工作。
→He doesn’t work in a bank. 他不是在银行工作。
We often hear from her. 我们经常收到她的来信。
→We don’t often hear from her. 我们不经常收到她的来信。
I met her at the station. 我在车站见到了她。
→I didn’t meet her at the station. 我在车站没见到她。
③ 肯定句改否定句英语
肯定句和否定句
含否定词的句子称为否定句(Negative Sentence),不含否定词的句子就称为肯定句(Affirmative Sentence)。例如:
例:Mr. Walker is an Englishman.
(华克先生是英国人。——肯定句)
例:He is not an American.
(他不是美国人。——否定句)
简单地说,表达事物的“Yes”这一面的句子就是肯定句,“No”的一面的就叫做否定句。
传统的英语入门都是先学肯定句,然后再学肯定句的反面,亦就是否定句。否定句的表达方式基本上有下面的两种。
(1)使用副词否定词“not”,例如:
(a)be,have为主要动词:
例:I am not a good swimmer.
(我不是一个游泳的好手。)
例:He was not at home yesterday afternoon.
(昨天下午他不在家。)
例:I have not much money.
(我没有很多钱。)
例:He has not many friend here.
(在这里他没有很多朋友。)
解说“be/have +not”常缩短成一词,尤其是日常谈话更是如此。例如:
例:You aren't [a:nt] a friend of his, are you ?
(你不是他的朋友吧,是不是?)
例:He isn't [>!znt] my brother.
(他不是我的兄弟。)
例:I wasn't [>w&znt] there at that time.
(当时我没有在那儿。)
例:There weren't [w+:nt] many people at the party yesterday.
(昨天没有很多人参加宴会。)
“am +not”不是“amn't”,而是“aren't”或“ain't[eint]”,例如:
例:I ain't ready.
(我还没准备好。)
例:I am very nice to you, aren't I?
(我对你很不错,是不是?)
美国人用“ain't”很随便,应该是“are not,is not,have not,has not”的地方,他们也会“ain't”一下就带过去,宜注意。
下面例句是“have not,has not”的缩短形。
例:I haven't[>h$vnt] a headache.
(我没有头痛。)
例:He hasn't[>h$znt] come yet.
(他还没来。)
(b)be,have为助动词
例:You aren't going to go to her birthday party, are you?
(你不打算参加她的生日宴会,是不是?)
例:It isn't raining outside.
(外面没有在下雨。)
例:She wasn't asked to speak at the meeting.
(她没有被请求在会上讲话。)
例:I haven't done anything wrong to her.
(他没有做对不起她的事。)
例:He hasn't yet paid the money.
http://www.oh100.com/a/201105/29.html
(他尚未付钱。)
be+ V -ing(进行时),be +P.P.(过去分词)(被动词态),have(has,had)+P.P.(完成时)等的“be,have(has,had)”皆为助动词。例1的“be going to …”在学校文法中也常被视为助动词。
(c)“助动词+V”时
动词带有助动词“will,shall,can,may,must,need,dare,ought to,used to,had better”等时,将“not”置于助动词与主要动词之间。例如:
例:I will not do it again.
I won't[wount] do it again.
(我不愿意再做这种事。)
例:The old man cannot find his way home.
(那个老人找不到回家的路。)
例:I couldn't sleep last night.
(昨夜我无法入睡。)
例:You ought not to swim in the river.
(你不应该在河里游泳。)
例:You had better not tell her everything.
(你最好不要样样事情都告诉她。)
注:“can”的否定形式是“cannot or can't”,不可写成“can not or cann't”。
(d)使用助动词“do”的否定句
一般动词的否定句通常使用助动词“do”,句式如下:
句型 do(does, did)+not + V(原形动词)
例:I don't know her very well.
(我并不很了解她。)
例:He doesn't like Chinese tea very much.
(他并不很喜欢中国茶。)
例:She didn't come to school this morning.
(今天早上她没有来上学。)
例:Don't believe him.
(不要相信他的话。)
注:“have”表达“有”以外的意义时,其否定句通常使用助动词“do”,例如:
例:Usually I don't have (=eat) breakfast on Sunday morning.
(通常星期天早上我不吃早餐。)
例:She doesn't have (=drink) coffee for breakfast.
(她不把咖啡充作早餐喝。)
例:We didn't have (=enjoy) a good time there yesterday.
(昨天我们在那里玩得不愉快。)
不过美式英语“have”作“有”的意义使用时也如一般动词使用助动词“do”,例如:
例:I don't have brothers.
(我没有兄弟。)
例:We didn't have time enough to finish the work.
(我们当时没有足够的时间完成那件工作。)
(2)使用“not”以外的否定词
“not”以外的否定词有:
(a)副词:never,seldom,hardly,little,neither,etc.
例:She never comes to school late.
(他上学从不迟到。)
例:She seldom comes to see me.
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(她不常来看我。)
(b)形容词:no,few,little,etc.
例:I have no brothers.(=I don't have brothers.)
(我没有兄弟。)
例:He has few friends in Hong Kong.
(他在香港几乎没有朋友。)
(c)代词:nothing,nobody,none,etc.
例:I know nothing about computer.
(对于电脑我一窍不通。)
I found nobody about computer.
(在那栋房子里我没看到任何人。)
④ 英语中怎么将肯定句改成否定句啊要详细点的,最好把各种情况考虑到。
一.肯定句变成否定句
如果句中有be动词is,am,are
或情态动词must,can等,在其后面直接加not,
she
is
your
mother.
she
isn't
your
mother
2.如果没有be动词或情态动词,加don't,does't或did't
she
likes
playing
football.
she
doesn't
like
playing
football.
二.肯定句变成疑问句
变成一般疑问句
如果有be或情态动词动词就把他们提前,
she
is
your
mother.
is
she
your
mother?
2.如果没有就在前面加do的某种形式,第三人称用does,过去时用did
she
likes
playing
football.
does
she
like
playing
football?
变成特殊疑问句,
要具体分析,看是对什么进行提问,简单来说,
1.对人提问用who,
she
is
your
sister.who
is
your
sister?
2.对事物用what,
the
book
is
on
the
desk.
what
it
is
on
the
desk?
3对时间用when,
she
will
come
back
tomorrow.
when
she
will
come
back?
4.对频率用how
often等等
i
play
football
everyday.
how
often
does
you
play
footall?
⑤ 英语、、、英语中的肯定句变否定句的规则
1.在一般现在时和一般过去时中,1)在be后加not.
He is here.否定:He isn't here They were very happy.否定:They weren't very happy
如动词是其它的实意动词:
2)如是动词原形则在前加助动词do 再加not;
They do sports every day.(do在这里是“做”的意思,是实意动词,不能直接加not否定)
否定:They don't do sports every day.
3)动词是第三人称单数则在前加助动词does 再加not; ,且单三还原成原形
He gets up at six.否定:He doesn't get up at six
4)动词是过去式,则在前加助动词did再加not;
We visited the old man yesterday.否定:We didn't visit the old man yesterday.
2.如果谓语动词是情态动词,则在情态动词后加not.情态动词也是一种助动词
We can dance very well.否定:We can't dance very well
3.如果谓语动词是其它时态,则在第一个助动词后加not
They are working hard.(be dong 中的be帮助构成了时态,是助动词)
否定:They are not working hard.
He has finished his homework.(have done 中的have帮助构成了时态,也是助动词)
否定:He has not finished his homework.
4.使用no,hardly,seldom,never,nobody,few,little 等否定词
Nobody is in the room.=There is not anybody in the room.
⑥ 五年级英语如何把肯定句改为否定句
变特殊疑问句·加疑问词【who,whose,why,which,when,what】再加助动词【do,does】或be动词【am,is,are】或情态动词【must,can·····】再加一般疑问句。加问号【很重要】
变一般疑问句,把be动词往前提,把句子中有的可以造抄,最后加问号。【很重要】
但多数情况要你自己去灵活应对!加油!^_^~
⑦ 英语中把肯定句改成否定句的规则
否定句只是句子的意思变成了否定,并使更改句子的结构和时态。所以如果进行时ing的话,当然不能还原了。时态不变原则。
1 时态不变
2 主动被动不变
3 人称不变
4 结构不变(不定式、从句、情态动词。。。)