crops and fruit作主语,be动词是is还是are?如题

crops and fruit作主语,be动词是is还是are?如题 Fruit 什么时候作不可数,什么时候可数.milk and cola are both fruit or fruits. 我的最爱是水果.翻译可以说My favorite is fruit.favorite可以作主语吗? some fruit 作主语后面是用is 还是用are呢? eat more fruit and less meat to keep health 这个句子对吗?主语为什么不用eating 苹果作主语强调种类用单数还是复数例：Apple is a kind of fruit. 还是 apples are a kind of fruit. food和fruit什么时候用复数,什么时候用单数?作主语时用单数还用复数? The secretary and principal作主语为什么是单数? They vegetables and fruit 这个句子是形式主语句型吗Eating vegetables and fruit are good for him.如果不是，请帮我改成 形式主语句型 be +adj + to do当物作主语是不定式是主动形式,为何不是被动呢?如The fruit is ont fit to eat 衷心感谢这位同学!1.Cereal crops are grown for their edible fruit,botanically called a caryopsis but popularly referred to as a grain,a kernel,or a seed.The seed is a single fruit consisting of two major components,the endosperm and the embryo 英语翻译英语作主语 动词ing作主语 什么是动名词作主语 副词作主语例句 用he作主语 用he作主语.