1. How long are you teaching at that school ?
→ How long have you teached at that school ?
2. Tourists usually have a bus to the countryside .
→ 2. Tourists usually have buses to the countryside .
3. What about go to the department store with me ?
→ What about going to the department store with me ?
4, I prefer go by train . It is much more comfortable .
→ I prefer to go by train . It is more comfortable .
5, I teach English here since I graduated from university .
→ I have teached English here since I graduated from university .
6, 6. If I was her , I would go to the circus with them .
→ If i were her , I would go to the circus with them .
7, You needn't to worry about meeting me at the station , I'll get a taxi .
→ You don't need to worry about meeting me at the station , i'll get a taxi .
8, My teacher makes me to do all these exercises .
→ My teacher makes me do all these exercises .
9, If I would have known , I could have helped you .
→ If I have known , I could have helped you .
10, He didn't used to behave like that , but now he is rude .
→ He didn't use to behave like that , but now he is rude .
11, They never visited London before their first visit in 1987.
→ They have never visited London before their first visit in 1987.
12, Wearing uniform helps students feel equally in many ways .
→ Wearing uniform helps students feel equal in many ways .
13, Uniforms encourage students to be pride of the school they are going to.
→ Uniforms encourage students to be pride in the school they are going to.