1.Can you give us more example(example变不变复数?为什麽?)2.Chemistry is Grace`s favorite subject at school 变同义句 Grace like chemistry best at school(like加不加s?为什麽?)3.She was having a conversation with our teacher (conversa

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1.Can you give us more example(example变不变复数?为什麽?)
2.Chemistry is Grace`s favorite subject at school 变同义句 Grace like chemistry best at school(like加不加s?为什麽?)
3.She was having a conversation with our teacher (conversation加不加s?为什麽?)
4.什么是第三人称?我只知道it ,she ,he,请举几个例子
5.Are the old people siting under the tree you panents?(为什么是Are,为什麽不是Is?)

1.can you give us more examples,要用复数,example是可数名词
2.grace likes chemistry best at school,Grace是第三人称单数,动词后面要加s
3.she was having a conversation with our teach,conversation不可数,have a conversation是固定搭配,谈话的意思
4.除了我、你、他们以外的个人都是第三人称单数
5.are the old people siting under the tree you parents.people单复同形,只能用are,而且后面说了是parents,是复数

1.不可数