fruit和vegetable什么情况下用单复数

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• vegetable 和 fruit 的复数分别是什么?
• vegetable,fruit和food的单复数如何区分使用
• who用单数第三人称吗?如果不知道主语的单复数,who后面用原形还是单数第三人称?比如“谁想和我唱首歌?”是用“Who want to sing a song with me?”还是“Who wants to sing a song with me?”类似的,在不知道单复数的情况下,特殊疑问句里的动词用哪种形式?比如“里面有什么?”“What's in it?”“What are in it?”都可以用吗?或一般用哪一种?如果下文出现的是复数呢？比如第二句回答“There are some pens in it.”那么前面仍用单数吗？
• a day or two is enough 和one or two reasons are supported中的be动词不同是因为主语的单复数不同还是意思的不同?前者为什么用is 后者为什么用are 求详解
• 有几个英语句子没看懂,麻烦解释下1.It is more difficult to write simply,directly,and effectively than to employ flowery but vague expressions thay only obscure one's meaning.从than后面开始句式就不懂了,vague和obscure不重复吗?2.The knee is the joints where the thigh bone meets the large bone of the lower leg.joint为什么用复数?3.Acids are chemical compounds that,in water solution,have a sharp taste ,a corrosive action on metals,and the ability to turn certain blue vegetable dyes red.为什么用a sha
• any other和any的区别和后面加名词的单复数.everyone和each of us是否相同.有例题:上海比中国的任何一个城市都要大 Shanghai is bigger than any other city in China.上海比日本的任何一个城市都要大 Shanghai is bigger than any cities in Japan.any other后面加的是单数还是复数?any后面呢?它们这样用的区别是什么.还有.each作代词可以和of连用,例如each of us has a book.而everyone也是代词,那可不可以用everyone代替这一句中的each of us?
• 单复数同行的词都是集体名词吗?The species is[are] valuable.这一物种很珍贵.比如前面这句,species是单复数同行的词,这里为什么可以用is和are各代表什么意思啊?
• My favorite food is dumplings还是dumpling.A（The) mango is a kind of fruit.我知道了就不用说了.那么（1）Mango is a kind of fruit.还是(2)Mangoes is a kind of fruit.还是(3)Mangoes are a kind of fruit.如果(3)是对的那么are后面可以用a kind 这几个哪个对?Elephant is a kind of animal.复数数名词可以表示一类人或事物,那么单数不加a(an)的名词能不能表示一类人或事物呢?他们有什么区别!“一根面条”“一碗米（不和一碗饭混淆的情况下）”怎么说.My favorite food is dumplings还是dumpling.My favorite food is 后面接单数还是复数,我看了一个题目答案是dumplings请详细说明!
• 帮我看看这句话有什么语法错误吗 就是语法和介词用的 there are several meansures for us to adopt in the fisrt place improve the ideological consciousness in the secend place strengthen education improve the qulity.我翻译成 有几个可供我们采纳的方法 第一方面 提高思想意识 第二方面 加强教育提高素质 不合适的话帮忙改成合适的there are several meansures for us to adopt in the fisrt place improve the ideological consciousness in the secend place strengthen education improve the qulity单复数 词用的合适不合适呀 语法一类的问题
• a variety of句中动词单复数A wide variety of opinions have been expressed on the plausibility of these threats.和A considerable variety of opinions on this subject has at different times been advanced from the earliest times.都是 a variety of opinions为主语,为什么一句用单数一句用复数?这个是《英语语法实践指南第四版》主谓一致里面的。书上说通常a variety of+复数名词+复数动词，后面又写a variety of也见于这样的句中（第二句）。第二句到底特殊在哪里了？非要让a variety of 这么用？
• 连词成句it's,eat,good,vegetables,for,day,you,to,some,every
• food,fruit,snack,vegetable,drink应该用单数还是复数,加S吗?谓语用单数还是复数?