错 IS 后面跟单数

所以 apple 就可以了 不用加S

其他的正确..

My Favourite Food I eat many kinds of fruits. They are pears, watermelons, apples, bananas, grapes, strawberries and so on. But I like grapes best. There are green grapes, red grapes and purple grapes. They all look beautiful. Grapes taste very nice . They are sweet and a little sour, They are good for our health . So grapes are my favourite fruit. 翻译：我最喜欢的食物我吃多种水果。他们是梨，西瓜，苹果，香蕉，葡萄， 草莓等。但我最喜欢葡萄。有绿葡萄，红葡萄和紫色的葡萄。她们 看上去都很漂亮。葡萄味道非常好。他们有点甜酸味，他们是很 好的为我们的健康。因此，葡萄是我最喜欢的水果。 够简单了吧，帮你吧O(∩_∩)O