There is no point in doing的句型,如果用于过去时,那么is要成was吗?为什么老师说不变_百度作业帮
There is no point in doing的句型,如果用于过去时,那么is要成was吗?为什么老师说不变
There is no point in doing的句型,如果用于过去时,那么is要成was吗?为什么老师说不变
There is no point in doing是固定用法,be动词不会发生变化,这是there be 句型中最特殊的一个,要单独记,下面是我查的,感觉很不错分析的,望对你有帮助There be句型的基本用法是表示“某地(或某时)存在有某人(或某物),而并非某地(某人、某物或某时)拥有什么东西”,其形式为“There be＋代词或名词(短语)＋地点/时间状语”.(其实质句式为倒装句)这里there是引导词,没有词义,be是谓语动词,代词或名词(短语)是主语.be要与主语保持人称和数的一致.否定句是在be后加not；一般疑问句是将be放在句首；反意疑问句中的简短问句是由“be(或其否定式)＋there”构成.例如：
1.There is a desk and two chairs in the room.
(紧挨着be动词的主语是a desk,是单数,故be的形式要用is)
2.There aren't two chairs and a desk in the room.(否定句)
3.Is there anything wrong with your ears?(Yes,there is/No,there isn't.)
4.There wasn't a meeting yesterday,was there?(反意疑问句)
除此之外,还有一个重要句式“有某人在做某事”,要用“There be＋sb.＋doing sth.＋地点/时间状语”.例如：
There are several children swimming in the river.河里有几个孩子在游泳.
不难看出,各种时态的变化是通过be动词的变化来体现的.我们在使用过程中,首要的问题是弄清楚There be与have所表示的意义.There be句型表示“存在”关系,have表示“所属”关系,两者不能混合在一个句子中.
例如：我们要说“明天有一个班会.”
(1)There will have a class meeting tomorrow.(×）
(2)There is going to/will be a class meeting tomorrow.(√)
有时候既表示“存在”又表示“所属”时,两种都可以用.
例如：Class Three have a map of China on the wall.(地图为三班学生所有.)
There is a map of China on the wall in Class Three.(地图存在于三班.)
由此看来,There will have是错误的搭配方式.
使用There be句型时除了掌握基础知识外,还应注意以下问题：
1.There be句型的考查更多的是将be动词与主语结合在一起进行的,即主谓的一致性.
例如：(1)There is _____ on the floor.
(2)There are _____ on the floor.
选项：A.cat B.water C.boxes D.football
解析：(1)由is可知主语应是可数名词单数或不可数名词,而A、D项中都缺少冠词a,故选B,同理可知(2)应选C.
2.如果作主语的是一个短语,则常常考查短语中的修饰语.可数名词的复数形式前可以用any,some,few,a few,many或用数词＋hundred/thousand/million,hundreds/thousands/millions of,no等修饰；不可数名词可以受any,some,no,little,a little,much等词的修饰.例如：
(1)There were_____students in our school.
A.hundreds B.eight hundred
C.eight hundreds of
(2)There is _____water.You needn't get some more.
A.few B.little C.much
解析：(1)由数词与名词的搭配关系可知选B,(2)由water可知排除A项,再由后一句意思便知选C.
3.注意不定代词的用法.
(1)不定代词在句中作主语,谓语动词要用单数形式.例如：There is nothing in the fridge.(2)不定代词受形容词修饰时要放在形容词前面.例如：There is something interesting in today's newspaper.
4.There be句型的反意疑问句,要注意陈述部分的形式.
如果陈述部分含有little,few,no,nobody,none等否定词时,后面的简短问句中要用肯定形式.例如：There is nobody in the room,is there?
但有的含有否定意义的形容词修饰不定代词时则仍看做肯定句式.例如：There is something unusual in the room,isn't there?
5.要注意句子前后意思的一致性.
有的句子单独看其意义时,可能不止一个选项适合于它,但如果联系上下句的意思则只能有一个恰当的选项.
例如：(1)There is _____ food.You needn't buy any.
A.any B.some C.no
(2) There is _____ food.You have to buy some.
A.any B.some C.no
从这两题中的第一个句子来看均可选用some和no,但与后面的句意结合看,答案则是唯一的：(1)B；(2)C.
6.There be句型还有就近一致原则：即be动词的数应与离它最近的一个主语保持一致.
例如：用be动词的适当形式填空
(1)There ___ an apple and three oranges on the table.
(2)___ there three oranges and an apple on the table?
解析：(1)因为该句中an apple才是与be动词接近的主语,而并非an apple and three oranges是句子的主语,故而(1)的答案应为is.
(2)因为该句中three oranges才是与be动词接近的主语,而并非three oranges and an apple是句子的主语,故而(2)的答案应为Are.
There be句型命题趋向有两个方面：一是进一步加强对知识的理解与运用方面的考查.例如be动词与主语的一致性、名词或代词的修饰语、搭配关系、含否定词的反意疑问句等.二是有可能出现“有某人在做某事”这一句型,即“There be＋sb.＋doing sth.＋地点/时间状语”.另外,还得提醒一下同学们,如果要表达诸如“这里/那里(挺漂亮……)等”这样的修饰句型,应用“It’s… here/there.”而不是“Here/there is…”.虚拟语气中was要用were代替吗He looks as if he were a football player.为什么用were不能用was请问虚拟语气中还有什么特例吗?_百度作业帮
虚拟语气中was要用were代替吗He looks as if he were a football player.为什么用were不能用was请问虚拟语气中还有什么特例吗?
虚拟语气中was要用were代替吗He looks as if he were a football player.为什么用were不能用was请问虚拟语气中还有什么特例吗?
在虚拟语气的从句中,动词'be'的过去时态一律用"were",不用was,即在从句中be用were代替.If I were you,I would go to look for him.如果我是你,就会去找他.If he were here,everything would be all right.如果他在这儿,一切都会好的.典型例题_____ to do the work,I should do it some other day.A.If were I B.I were C.Were I D.Was I 答案C.在虚拟条件状语中如果有were,should,had这三个词,通常将if省略,主语提前,变成 were,should,had +主语的形式.但要注意,在虚拟条件状语从句中,省略连词的倒装形式的句首不能用动词的缩略形式.如我们可说 Were I not to do.,而不能说 Weren't I to do.
规定，不论第几人称都用were还有虚拟语气里时态向前，一般过去变现在完成，现在完成变过去完成，以此类推
were 是虚拟语气中特有的,比如:if i were you, i would kill myself...这里也用的是were,虚拟续期里were这样用很常见,习惯就好.其他如果不是要用be动词来表达虚拟,那么用过去式,比如下面的killed:if you killed her, i will kill you.
不能用was代替were
对,虚拟语气中没有was
这是虚拟语气的要求，不管是第几人称，谓语动词必须用were，虚拟语气分三种，对过去的虚拟、对现在的虚拟以及对未来的虚拟。相信三种虚拟的句型你已经知道了。还有一种叫做错综虚拟语气，就是主句和从句虚拟的时态不一样。在表示虚拟语气的句子中，条件从句表示的的动作与主句表示的动作发生的时间并不一致，这时，谓语动词的形式要根据各自表示的时间来调整，这种现象叫作错综时间虚拟语气，也...There was ________ t
There was ________ time __________ I hated to go to school.
_百度作业帮
There was ________ t
There was ________ time __________ I hated to go to school.
There was ________ t
There was ________ time __________ I hated to go to school.
A.a; that&&&&&&&& B.a; when&&&& C. that&&&&&& D. whenThere was ________ t
There was ________ time __________ I hated to go to school.
_百度作业帮
There was ________ t
There was ________ time __________ I hated to go to school.
There was ________ t
There was ________ time __________ I hated to go to school.
A.a; that&&&&&&&& B.a; when&&&& C. that&&&&&& D. whenWe were to have told you,but you were not in.用were to tell不就可以了么（这是一个选择题）,为什么选项要用have told.I was to have gone on Tuseday.But on that day,I had a terrible cold so I decided to wait till Wednesday.同类型_百度作业帮
We were to have told you,but you were not in.用were to tell不就可以了么（这是一个选择题）,为什么选项要用have told.I was to have gone on Tuseday.But on that day,I had a terrible cold so I decided to wait till Wednesday.同类型
We were to have told you,but you were not in.用were to tell不就可以了么（这是一个选择题）,为什么选项要用have told.I was to have gone on Tuseday.But on that day,I had a terrible cold so I decided to wait till Wednesday.同类型的。He was to have been here by 7but now it's 9 and there is no sign of him.同类型的。
用to have told.下面分析为什么用to have told.We were to have told you,but you were not in.我们应该早就告诉你,但你那时不在.to have told 是不定式的完成时,表示“应该已经.的了”,表示动作已经过去.We were to tell you,but you were not in.意思是：我是要（将来）告诉你,但你那时（以前）不在.to tell表示动作还没发生,表将来发生的动作为.那这句话就应这样理我以后告诉你,但你以前不在.这是什么逻辑?
这句话的意思是：我们本来打算告诉你的，但是你不在。重点在这个“本来”二字上面，用完成时表示。如果没有完成时，仅用were to tell，就是我们打算告诉你，但是你不在，没有这层语气了。
用have told表示过去完成时，表示过去已经告诉。have gone 也是一样，表示过去已经去过。