知识点
It keeps them high in the sky.
句型:
It keeps them high in the sky.
It makes the air dirty. They keep the place clean.
语法:人称代词的宾格
|
|
第一人称 |
第二人称 |
第三人称 |
|
单数 |
me |
you |
him/her/it |
|
复数 |
us |
you |
them |
题库
课后题