Unless/If

Unless we ... the way we travel, we will have serious environmental problems.

• change

• will change

• won't change

You have to pay to enter the exhibition...

• ...unless you aren't over 65 years old.

• ...unless you are over 65 years old.

• ...unless you will be over 65 years old.

I'm not buying that computer...

• ...unless they won't give me a discount.

• ...unless they give me a discount.

• ...unless they gave me a discount.

_________________, I'll have to buy that monitor.

• Unless I can find a cheaper one,

• Unless I can't find a cheaper one,

• Unless I will find a cheaper one,

___the room is cleaned, you can’t go out tonight.

• If

• Unless

_____ you smoke like this, you will be seriously ill.

• Unless

• If

You will feel cold ___ you wear a warm jacket.

• unless

• if

____ you exercise regularly, you'll lose some weight.

• Unless

• If

We’re going for a bike ride this weekend _____ it rains.

• if

• unless