Don't fight in class. 不要在課堂上打架。
Don't climb the tree, it's too dangerous.不要爬樹,它太危險。
I like climbing the tree, it's exciting.我喜歡爬樹,它激動人心。
There are many tables in the classroom.教室裏有許多桌子。
There is a table in my bedroom.我的卧室裏有一張桌子。