1, Don't leave the lights all night or you'll waste electricity.

-> If you leave the lights all night, you'll waste the electricity.

2, Don't be impatient or you'll fail the driving test.

-> If you are impatient , you'll fail the driving test.

3. Don't come here or you will be injured.

-> If you come here, you'll be injured.

4, Recycle and we will save natural resources.

-> If we recycle , we will save natural resources.

5, If you don't hurry up, you'll miss the meeting.

-> Unless you hurry up, you'll miss the meeting.

1, Don't leave the lights all night or you'll waste electricity.

-> If you leave the lights all night, you'll waste the electricity.

2, Don't be impatient or you'll fail the driving test.

-> If you are impatient , you'll fail the driving test.

3. Don't come here or you will be injured.

-> If you come here, you'll be injured.

4, Recycle and we will save natural resources.

-> If we recycle , we will save natural resources.

5, If you don't hurry up, you'll miss the meeting.

-> Unless you hurry up, you'll miss the meeting.