介绍我们的教室:
What's in the classroom?
We have a new classroom.
We have 6 new lights.
Let's go and have a look.
It's near the door.
A board, two lights, many desks and chairs ....

用This is ...句型描述教室中的事物:
This is my classroom. The wall is white. The floor is green.
用Let's ... 和Let me ...表达建议和意愿:
Let's clean the classroom.  
Let me clean the board.
  表示赞同的回答:
Good idea.         All right.
夸奖某物或某人:
It's nice.     It's nice and clean.     Good job!
 
  询问及回答颜色:
What colour is it?     It's black and white.
提出请求及回答:
May I have a look?    Sure. Here you are!
表示惊讶:
Really?
询问及回答多少:
How many ... do you have?
I have ...

表达书包很重:
My schoolbag is heavy.
询问里面有什么:
What's in it?
 
  向别人介绍自己的朋友,可以用句型:
My friend is.....
He/She's...

例如:
My friend is a boy/girl. /She is thin. /He is strong.
描述朋友的特征,可以用句型:
He/She has...
例如:
He has short black hair.
She has long hair. 
描述你朋友的兴趣爱好可以说:
My friend/He/She likes...
例如:
My friend likes music.
He likes sports.