小学二年级英语语法知识点：be动词
1、Basic form: am/are/is
2、肯定和否定句：I am (not) from London.
My eyes are (not) small.
My hair is(not) long.
3、一般疑问句：Am I a Chniese? Yes, you are. No, you aren't.
Are they American? Yes, they are. No, they aren't.
Is the cat fat? Yes, it is. No, it isn't.
