=>

1. He turned out the light not to waste electricity. 

2. My mother needs a tin-opener to open this bottle.

3. We get up early so as to do morning exercises.

4. She locked the door so as not to be disturbed.

5. We wore warm clothes in order not to get cold.

6. I took off my shoes in order not to make any noise. 

7. He opened the window to let fresh air in. 

8. I took my camera in order to take some photos. 

9. He studied really hard so as to get better marks.

10. Jason learns Chinese to work in China. 

11. I've collected money so as to buy a new car. 

12. I will come with you to help you. 

13. We are going to cinema in order to watch a horror film. 

14. You must take your umbrella so as not to get wet. 

15. He waited at the counter to see her. 

16. We all put on our coats not to feel cold.