1. If/people/ not/ stop/ dumping/ waste/ into/ rivers/,/pollution/ increase/.
`->` If people don't stop dumping waste into rivers, the pollution will increase.
- Câu điều kiện loại 1
2. If/ polar/ ice caps/ melt/ ,/huge landmasses/ be/ under/ water.
`->` If the polar ice caps melt, huge landmasses will be under water.
- Câu điều kiện loại 1
3. If the air/ in/ city/ be/polluted/ ,it/can/ cause/ people’s/ respiratory/ problems.
`->` If the air in city is polluted, it can cause peole's respiratory problems.
- Câu điều kiện loại 1
4. If/smog/ be/ frequently/ formed/ in/ city/,/it/ cause/ difficulty/ in/ breathing/ headache/ even/ lung cancer.
`->` If smog is frequently formed in the city, it will cause dificulty in breathing, headache and even lung cancer.
- Câu điều kiện loại 1
5. If/ carbon monoxide/ concentrate/ in/ great/ amounts/, /it/ be/ harmful/.
`->` If carbon monoxide concentrates in great amounts, it will be harmful.
- Câu điều kiện loại 1
6. The climate/ change/ if/ more trees/ be/ cut/ down/ for/ hardwood/.
`->` The climate will change if more trees are cut down for hardwood.
- Câu điều kiện loại 1
7. If/ we/ not/ control/ pollution/ soon/,/it/ be/ too/ late/.
`->` If we do not control the pollution soon, it will be too late.
- Câu điều kiện loại 1
8. If/we/ not/ protect/ frontier/,/we/ suffer/ many/ from/ natural/ disasters.
`->` If we don't protect the frontier, we will suffer from many natural disasters.
- Câu điều kiện loại 1
- Công thức: If + S + V(s/es) + O,S + will/can/... + V-infi + O