$5$. today were Sunday , we could go swimming

$6$. we took this job , we would earn a lot of money

$7$. he knew that it was dangerous , he would come

$8$. you slept under a mosquito net , you would not be bitten so often

$9$. I had a degree , I could get a job easily

$10$. we had much rain , our crops would grow fast

$11$. we found him early , we could save his life

$12$. he tried , he could be a medical student

$13$. he stopped smoking , she could get fat

$14$. he knew it was good for his health , he would do

$15$. I spoke English , my job would be easy

$16$. he had enough money , he would buy a house

$17$. I were you , I would tell the truth

$18$. we did not explain more , he would understand

=>

5. If today were Sunday, we could go swimming.

6. If we took this job, we would earn a lot of money.

7. If he knew that it was dangerous, he wouldn't come.

8. If you slept under a mosquito net, you wouldn't be bitten so often.

9. If I had a degree, I could get a job easily.

10. If We had much rain, our crops would grow fast.

11. If we found him early, we could save his life.

12. If he tried, he could be a medical student.

13. If he stopped smoking, he could get fat.

14. If he knew it was good for his health, he would do.

15. If I spoke English, my job would be easy.

16. If he had enough money, he would buy a house.

17. If I were you, I would tell the truth.

18. If we didn't explain more, he wouldn't understand.