`1` You can reduce your water bill if you take showers instead of baths.

`2` If you don't hurry up, we will leave without you.

`3` If they want to reduce air pollution, they should use public buses instead of motorbikes.

`-` in order to do sth: để làm gì

`-` want to do sth: muốn làm gì

`4` If you go out with a raincoat, you will get wet.

`5` If people travel by bike, they can help reduce air pollution.

`6` If you throw a stone into water, it will sink.

`=======`

`-` Câu điều kiện loại `1` `->` diễn tả sự việc, hành động có thể xảy ra ở hiện tại hoặc tương lai:

`@` If + clause (HTĐ), S + will/can (not) + V

`1)` If you take showers instead of baths, you can reduce your water bill.

`2)` If you don't hurry up, we will leave without you.

`3)` If they use public buses instead of motobikes, air pollution can be reduced.

`4)` If you go out without a raincoat, you will get wet.

`5)` If we travel by bike, air pollution can be reduced.

`6)` If we throw a stone into water, it will sink.

`(**)` Cấu trúc câu ĐK loại 1 (conditional type 1):

If + HTĐ, S + will/can/may/.. + V(inf)

`->` Cấu trúc HTĐ với tobe và V(thường):

`-` Tobe: 

`(+)` S + am/are/is + N/Adj

`(-)` S + am/are/is + not + N/Adj

`(?)` Am/Are/Is + S + N/Adj..?

`-` V thường: 

`(+)` S + V/Vs/Ves

`(-)` S + don't/doesn't + V(inf)

`(?)` Do/Does + S + V(inf)..?

`-` Trong đó:

S số nhiều (they/you/we/.. ) `->` dùng do/don't/are

S số ít (he/she/it/..) `->` dùng is/does/doesn't

S là I `->` am/do/don't