1.There is a peach on the tree.单复数配合问题~~如果是单数就得用is 相应的名词也得变为单数形式
2.He has a English stamp.将第三人称复数变为单数 相应的谓语动词也要随人称变化 名词也要变为单数
3.Where is his apple?将第三人称复数的所有格形式变为第三人称复数~名词变为单数
4.That is a ruler. those 对应的单数形式是that ruler 是可数名词 前面加a
5.There is a man in her house. people是不可数名词 不能用a 所以改为man
6.Thereis a fish in the river.fish 在表示鱼有几条的情况下~是可数名词~
7.There is a flower in the garden.单复数变化
8.There is an air-conditioner on the wall. air是元音 变为单数要用an