Умовні речення першого типу/Conditional I

1. If he___( to polute) water, he___(to do harm) to the environment.

2. Our streets______ (to be clean) if you_____( not to litter).

3. If Bob and Bill____(to clean up) after picnics together with their friends, Ann____(to invite) them to the party next Friday.

4. Kate ____(to meet) you, if I____(to be) here tomorrow.

5. If people______(to stop) throwing rubbish into the local river, clean water____(not to be) a problem in this town.

6. They_____(to visit) London Eye if she____(to come) to London next week.

7.I____( not to buy) a souvenir if the shop_____(to be) closed next Wednesday.

8. Animals _____(not to be) in danger if we_____(not to cut down) the trees.

9. You_____( to be) healthy if you____(not to eat) junk food.

10. If I ____ ( to see) Jack tomorrow, I _____( to tell) him about it.

11. They ____(to pass) the exam if they_____(to work) hard.

If the sky _______________ (be) red in the morning, it _______________ (rain) later that day.

If the weather (not improve) , we (not go) for a walk.

If she (not/go) to bed early, she (not wake up) in time.

We _______________ any tickets for the performance unless we _______________ them in advance. (NOT GET, BUY) 

If it still _______________ tomorrow, I _______________ to work. (RAIN, NOT GO)

If he goes to Dan's birthday party, he _________________ a present (BUY)

She _________________ him if she loves him enough. (MARRY) 

Choose the correct variant

 More species ... (to survive) if we ... (to protect) nature.

If there.... a rubbish everywhere, it will be dangerous for wild animals.

If factories_____________so much plastic, there __________ less rubbish.

Many species _____ (disappear) if we ______(not protect) endangered animals and plants.

You_____( to be) healthy if you____(not to eat) junk food.

If we ______ (to recycle) papers we ______ (to save) many trees.