为什么可以说There are many fish 却不可以说There are many grass

为什么可以说There are many fish 却不可以说There are many grass how many windows are there in your room?可不可以说how many windows in your room? There wii be many girls at the party tomorrow!这句话怎么造问句?可以说well there be many girls吗?可不可以说'are there any girls well be there?还是其他的?Are any girls well be there? There are many sheep on the hill.为什么用many? There are many animals______farm how many bridges are there?a.there are two.b.there is only one.为什么? how many bridges are there?a.there are two.b.there is only one.为什么? there are 和are there有什么区别.how many colours there are in a rainbow为什么不能用how many colours are there in a rainbow There are many interesting places _(vist)in Beijing.为什么? There are many people coming here 为什么come变coming There are many people on it（为什么不是much） there are many holes ( )the groundthere are many holes ( )the ground 请说明为什么 There are many students TO play games 为什么用to?不是There are sb doing sth how many tv rooms are there in the building.为什么加are there?蟹蟹! how many birds are there in the picture为什么are放在前面there放在后面? how many ball pens are there in the pencil-box?为什么中间要加are there? there are also many thing you can do为什么用there are “How many days are there in a week?”这句话为什么要加“are there”?