一、阅读下面李明的笔友 Justin 的博客，注意观察画线部分的“人称代词 + be 动词”和黑体物主代词。
Subject: My friends
I am Justin. I'm 12 years old. I'm from America. I am a middle school student. My favourite animal is the dog. I have three good friends. They are Jack, Lisa and May. We are in the same school. Jack is 13 years old. He is my best friend. He's also an American. His favourite animal is the dog too. Lisa is from Australia. She is 12 years old. Her best friend is May. They like the same animal. Their favourite animal is the cat. My friends are all very nice. We usually play together in our school. We're all very happy!

二、参考 Justin 博客中的“人称代词 + be 动词”和物主代词，补全下面表格。
| 代词主格 | I | he | she | we | you | they |
| --- | --- | --- | --- | --- | --- | --- |
| be 动词 | am | ______ | ______ | ______ | ______ | ______ |
| 形容词性物主代词 | ______ | his | | ______ | ______ | ______ |
I am = ______ He is = ______
She is = ______ We are = ______

is
; are
; my
; her
; our
; your
; their
; I'm
; He's
; She's
; We're

三、根据 Justin 的博客用代词、be 动词（可用缩略形式）完成以下句子。一空一词。
1. Justin ______ 12 years old. ______ from America.
2. Justin’s best friend ______ Jack. ______ favourite animal is the dog.
3. Lisa has a best friend. ______ name ______ May.
4. Justin usually plays with ______ friends. ______ ______ very nice.
5. “______ all very happy!” says Justin.

is
; He's
; is
; His
; Her
; is
; his
; They
; are
; We're