1.介绍他人
1) This / That i s．．．这／那位是．．．．．．
２）These / Those are．．．这／那些是．．．．．．
This is my friend Jane.这（位）是我的朋友简
That is my grandfather. 那(位)是我的祖父。
These are my brothers. 这些是我的兄弟。
Those are my parents. 那些是我的父母。
2. This is my friend. 复数 These are my friends.
That is my brother. 复数 Those are my brothers.
