以下题目是新概念英语经典练习中的改错病句的习题，想了几天还解决不到，谁能帮我看看这些题错在哪？

1. Mathematics are my favorite subject.___________

　　2. They have no any time to waste.___________

　　3. Have you ever gone to Hangzhou? ___________

　　4. He asks me what shall we do after lunch.___________

　　5. I have done my homework yesteray.___________

　　6. A number of students is there.___________

　　7. Here are two books. Which one do yo like best?___________

　　8. It is old enough for the boy to go to school. ___________

　　10.Between you and he, there is a difference. ___________

　　11.They are talking each other.____________

1. Mathematics is my favorite subject.

2.They have no time to waste./They don't have any time to waste.

3.Have you ever been to Hangzhou?

4. He asks me what we shall do after lunch.

5. I did my homework yesteray.

6. A number of students are there.

7. Here are two books. Which one do yo like better?

8. The boy is old enough to go to school.

10.Between you and him, there is a difference.

11.They are talking to each other.

1 are_is

8 第一个to改成too

1.are 改成 is

2. 去掉any

3.gone 改成 been

4.shall we do 改成we shall do (宾语从句后面用陈述句语序）

5.have done 改成 did（yesterday 说明是一般过去时）

6.is 改成are

7.best 改成better （两者比较）

8.is后加not

10.去掉a

11.talking后面加with

好

It is easy. All are normal error.

1.Mathematics is my favorite subject.

2.We have no any time to waste.

3.Have you ever been to Hangzhou?

4.He asks me what shall I do after lunch?

5.I did my homework yesterday.

6.A number of students are there.

7.Here are two books.Which one do you like better?

8.The boy is old enough to go to school.

9.There is a difference between you and him.

10.They are talking with each other.