1. When the sun comes in, the doctor goes out. 

2. Where the sun enterd, the doctor does not. 

3. Never let the sun go down on your anger. 

4. There are spots (even) in [on] the sun. 

4. Sentencedict.com is a sentence dictionary, on which you can find nice sentences for a large number of words.

5. One cloud is enough to eclipse all the sun. 

6. The moon is not seen where the sun shines. 

7. The morning sun never lasts a day. 

8. Make hay while the sun shines. 

9. More worship the rising than the setting sun. 

10. The sun shines all alike.

11. Let not the sun go down upon thy wrath. 

12. Let not the sun go down on your wrath. 

13. Nothing new under the sun.

14. The brightest of all things, the sun[Sentencedict.com], has its spots. 

15. There are painters who transform the sun to a yellow spot, but there are others who with the help of their art and their intelligence, transform a yellow spot into the sun. 

16. What is there sadder under the sun than a day that is gone and notyhing done. 

17. Save while you may, no morning sun lasts a whole day. 

18. He will shoot higher who shoots at the moon [sun] than he who aims at a tree. 

19. The sun dries the moisture on the ground.

20. His black hair gleamed in the sun.

21. The sun glinted on the windows.

22. The sun brought her out in an itchy rash.

23. The sun disappeared behind heavy clouds.

24. The iron heats up under the sun.

25. The unusually hot sun has fried up the crops.

26. The sun will evaporate the mist.

27. The sea sparkled in the sun.

28. A life without a friend is a life without a sun. 

29. For age and want save while you may; no morning sun lasts a whole day. 

30. If there were no clouds, we should not enjoy the sun.