语法总结
This is ... 的介绍句
This is + 人/物，用来介绍眼前的人或物。介绍姓名时可以接 His/Her name is ...。
例：This is my sister. Her name is Sally.
His 和 Her 的区别
his 表示‘他的’，修饰男性；her 表示‘她的’，修饰女性。后面都直接接名词。
例：His name is Paul. Her name is Sally.
be 动词 am / is / are
I 用 am；he、she、单数人名用 is；you、we、they 用 are。介绍年龄时也要使用 be。
例：I'm Kitty. She's twelve. We are classmates.
年龄的表达
询问年龄用 How old is he/she? 或 How old are you?；回答用主语 + be + 数字 + year(s) old。数字大于1时 year 要用复数。
例：How old is Jill? She's ten years old.
can + 动词原形
can 表示‘会、能’，后面必须接动词原形；主语变化时 can 不变。否定形式是 cannot 或 can't。
例：He can ride a bicycle. She can't swim.
一般疑问句 Can ...?
把 Can 放在句首询问能力，肯定回答为 Yes, 主语 + can.，否定回答为 No, 主语 + can't。
例：Can Tracy skip? Yes, she can.
名词所有格 's
人名后加 's 表示‘某人的’，例如 Peter's classmate 表示‘彼得的同班同学’。
例：This is Peter's brother.
like + 动词-ing
表达喜欢做某事时，like 后可接动词-ing；本课出现 like reading 和 like dancing。
例：Jill likes reading. She likes dancing.
There is / There are 的预备辨析
本课阅读中主要介绍人物；描述后续校园或家庭场景时，单数用 There is，复数用 There are。
例：There is a library. There are many books.