12. If you don’t brush your teeth every day, you will have toothache
=> Unless you brush your teeth every day , you will have toothache
13. If there is not better cure, the teacher will have a sore throat
=> Unless there is better cure, the teacher will have a sore throat
14. We will feel sick unless we do exercise regularly.
=> If we don't do exercise regularly, We will feel sick
15. The class will not be very noisy unless he keeps sneezing and coughing.
=> If he doesn't keep sneezing and coughing, the class will not be very noisy
16. If you don’t study very hard, you will be bad at English next term.
=> Unless you you study hard, you will be bad at english next term
17.. If you drink more water every day, you will not be tired.
=> Unless you drink more water every day , you will be tired
18. If you don’t throw rubbish onto the water, water will not be polluted.
=> Unless you throw rubbish onto the water, water will not be polluted
19. If you don’t go out at rush hour, you will not get into traffic jams
=>Unless you go out atảush hour , you will not get into traffic jams
20. Unless we keep the environment clean, we will not live long.
=> If we don't keep the environment clean, we will not live long.
Cấu trúc
If + S + V(s/es),S + will/can/shall + V(nguyên mẫu)
Unless + S + V (simple present), S + will/can/shall + V