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

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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
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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…”.