1.Work hard and you will pass your exam.

⇒ If you work hard, you will pass the exam.

2.My brother is not good at playing tennis.

⇒ My brother does not play tennis well.

3.I'll be on vacation next week, so I won't be able to attend the meeting.

⇒ Since I'll be on vacation next week, I won't able to attend the meeting.

4.If you don't start working hard now, so I won't be able to pass the final test.

⇒ Unless you start working hard now, you will be able to pass the final exam.

5.Someone should take this garbadge to the garbage dump soon.

⇒ This garbage should be taken to the garbage dump soon.

1-  If you work hard, you will pass the exam

2-  My brother does not play tennis well

3-  Since I'll be on vacation next week, I won't be able to attend the meeting

4-  Unless you start working hard now, you won't be able to pass the final test

5-  This garbadge should be taken to the garbadge dump soon