It is
possible to use other words instead of if in first conditional
sentences:
When: When the “condition” will definitely happen in
the future.
Look at the
difference between these two sentences:
- If I see Sam, I’ll give him your message. (I’m not sure if I will see him or not)
- When I see Sam, I’ll give him your message. (I will definitely see Sam)
As
soon as: To
emphasize immediacy.
- My feet hurt! As soon as I get home, I’m going to take off these high heels.
- As soon as we have enough money saved, we’ll take a vacation to Costa Rica. We can’t wait!
- I’ll respond to your e-mail as soon as I can.
Unless: Substitute for “if not.”
- You won’t lose any weight unless
you start eating healthier food.
= You won’t lose any weight if you don’t start eating healthier food. - I’m not going to dance unless
somebody invites me.
= I’m not going to dance if somebody doesn’t invite me. - Unless there’s an emergency at work,
I’ll be home on time.
= If there’s not an emergency at work, I’ll be home on time.
- Exercise 2
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