改写成否定句是:He didn't work yesterday.(他昨天没工作。)
改写成一般疑问句是:Did he work yesterday?(他昨天工作了吗?)
英语肯定句变否定句的方法可以参考以下:
1、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。
2、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”。
3、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。
4、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。
5、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。
6、当肯定句中含有too,also时,改为否定句,须将too,also改为either。
7、当肯定句中含有always时,改为否定句,须将always改为never。
8、当肯定句中含有already时,改为否定句,须将already改为yet。
9、当肯定句中含有nearly时,改为否定句,须将nearly改为hardly。
例句:
1、在一般现在时和一般过去时中,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
2、如动词是其它的实意动词: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
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
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.
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.
肯定句的意思是,表示肯定意义的句子是肯定句,如:I am a student. 我是学生。就是肯定句;与之相反的是否定句,表示否定意义,如--I am not a student. 我不是学生。
英语否定句是表示否定的句子,必须有否定词,如“not”。有了否定词才算否定句。英语否定句是中国人学习英语的一个重点,也是一个难点。唯有突破这类难点,才能使我们的英语学习有质的飞跃。
一般疑问句改法:谓语动词是be动词、助动词、情态动词时,直接将其置于句首;动词是行为动词时,在句首加上助动词Do、Does、Did后,动词改用原形。
1、第一家族:含be动词或情态动词的句子
秘诀:一调二改三问号
一调:即把句中的be或情态动词调到主语前;
二改:改换主语称谓,即将句中的主语I\my\mine\we\our\ours等第一人称分别改为相应的第二人称you\your\ yours等;
三问号:句末的句号改为问号。如:
I am an English teacher. → Are you an English teacher?
We can speak English fluently. → Can you speak English fluently?
2、第二家族:含行为动词(或称为实义动词)的句子
秘诀:一加二改三问号
一加:即在句首加助动词Do或Does;
二改:1、把谓语动词改为原形;2、改换主语称谓(同第一家族);
三问号:句末的句号改为问号
We read English every morning. → Do you read English every morning?
Tom’s father listens to English on the radio every evening. →Does Tom’s father listen to English on the radio every evening?
特别注意:对于第二家族一定要注意动词的还原,因为时态与数的变化已经体现在助动词上了
“some”还是“any”
在一般疑问句中,要表达“一些”时 ,一般用any,但如果这个问句是用来表达 “建议、请求、邀请”等交际功能时 ,应该用some.
Is there any tea in the cup?
Do you have any children?
May I have some fish?
Would you like some tea?
Shall we buy some vegetables?
Can I borrow some money from you?
Why not have some bread?
How about some orange juice?
强调一点,有some的要考虑是否要用any。