1. If / it / not rain / tomorrow / I / go / camping / my friends.

⇒ If it doesn't rain tomorrow , I will go camping with my friends .

2. I / never / travelled / by / air.

⇒ I have never travelled by air.

3 . The students / study / for exam / now.

⇒The students are studying for their exam now.

4. She / be / best / student / class.

⇒ She is the best student in class.

5. He / be / fond of / listen / music

⇒He is fond of listening to music.

6. How long / it / take / you / go school / everyday ?

⇒How long does it take you to go shool every day ?
7. I / not finish / homework / yet .

⇒ I haven't finish homewwork yet .

8. Lan / start / learn / English / 6 / years / ago

⇒ Lan started learning Enghlish 6 years ago.

9. We / know / each other / since / we / be / 6 years old.

⇒ We have know each other since we be 6 years old 

_Good study_

1. If it doesn't rain tomorrow I will go camping my friends

2. I have never travelled by air.

3. The students are studying for the exam now

4. She is the best student in her class.

5. He is fond of listening to music.

6. How long does it take you to go to school every day?

7.  I haven't finished my homework yet.

8. Lan started learning English 6 years agi.

9. We have know each other since we be  6 years old.