`5.` The earth become hotter. The polar ice cap melts

`=>` If the earth become hotter, the polar ice cap will melt

`6.` The polar ice cap melts. Sea levels rises

`=>` If the polar ice cap melts, sea level will rise

`7.` We don't use recycled products. We don't help the environment

`=>` If we don't use recycled products, we won't help the environment

`8.` We breathe polluted air. We suffer from lung diseases

`=>` If we breathe polluted air, we will suffer from lung diseases

`9.` People don't often cycled. There is a lot of air pollution

`=>` If people don't often cycled, there will be a lot of air pollution

`10.` You don't write on both sides. You waste your paper

`=>` If you don't write on both sides, you wil waste your paper

Mở rộng

`@` Cấu trúc câu điều kiện loại 1 ( Có thể diễn ra ở hiện tại ):

`+` Dạng khẳng định: If + S + `V_{(s, es)}`, S + will/shall/can/... + `V_{infi}`

`+` Dạng phủ định: If + S + don't/doesn't + `V_{infi}`, S + will/shall/can/... + `V_{infi}`

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