1.The girl is singing in the classroom.(改为否定句）(改为一般疑问句)2.They are looking for bag.(对画线部分提问）3.I am mending my bike now.(同上） 4.There are twelve studens over there.(同上）5.I can speak English.(改为一般疑问句）

1、The girl isn't singing in the classroom
Is the girl singing in the classroom？
2、what are they doing?
3、what are You doing？
4、how many students are over there ？
5、Can You speak English？、what can YOU DO?

1. The girl is singing in the classroom.
改为否定句:The girl isn't singing in the classroom.
be 动词+动词ing
改为一般疑问句：Is the girl singing in the classroom？
若句中有be动词，便把be动词提到句首
5.Can you speak English?
若句中有动词，便把动词提到句首
2.3.4.划线部分无，回答不了

The girl is not singing in the classroom.
Is a girl singing inthe classroon?
2.3.4划线在哪里？
Can you speak English?

1 Is the girl singing in the classroom?
2 What are they doing for?
3 What are you doing now?
4 How many student over there?
5 Can you speak English?

一般疑问句,就是将一般疑问词提到句首.没有一般疑问词（am is are）就加上助动词（be,do,have）放在句首.然后句子中间注意要改变的地方.基本助动词只有三个：be,do,have,他们没有词汇意义,只有语法作用,如协助构成进...

1.The girl is not singing in the classroom.
Is a girl singing inthe classroon?
2.what are they looking for?
3.what are you doing now?
4.how many students over there?
5.Can you speak English?