学习用具 :
学习用具 this is a
Pen (钢笔)
pencil (铅笔)
pencil-case ( 铅笔盒)
ruler (尺)
Eraser (橡皮)
crayon (蜡笔)
book (书)
bag (书包)
sharpener (卷笔刀)
school (学校)
They are :
They are 复数
I am :
I am teacher (教师)student (学生)
背背吧be （am.is .are）用法 :
背背吧be （am.is .are）用法 我用am，你用are，is连着他，她，它；
单数名词用is，复数名词全用are。
变疑问，往前提，句末问号莫丢弃。
变否定，更容易，be后not莫忘记。
疑问否定任你变，句首大写连成篇。
唱唱吧十个印第安小男孩曲调 :
唱唱吧十个印第安小男孩曲调 I am···you are···he is a student.
He is···she is···it is we can sing
We are··· You are ···They are students.
So many I can sing.
唱唱吧 :
唱唱吧 This is···that is···it is seem seem
We are··· You are ···They are
seem seem
The man is···the pen is ···the one is seem seem
So many I can sing.