You think Emma should book a seat on the train. Otherwise, she has to stand.
If Emma doesn't book a seat on the train, she'll have to stand.
I am really stressed out about work. Now, I can't have fun at this party.
If I wasn't so stressed out about work, I would have fun at this party.
Warn your friend not to put too many tins into the plastic bag or it'll break.
If you put too many tins into the plastic bag, it'll break.
You haven't got a pen, so you can't write down the address.
If I had a pen, I could write down the address.
I am late with my project because I always procrastinate.
If I didn't always procrastinate, I wouldn't be late with my project.
Your friend might need some help. If so, tell her to give you a ring.
If you need some/any help, give me a ring.
The automatic result of the door opening is the fan coming on.
If the door opens, the fan comes on.
I haven't got a key, so I can't get in.
If I had a key, I could get in.
You talk about football and I'm going to be very bored.
If you talk about football, I'm going to be very bored.
The baby is quiet, so we can sleep.
If the baby cried, we wouldn't be able to sleep.
You may want a chat, so just give me a ring.
If you want a chat, just give me a ring.
Nigel hasn't got satellite TV, so he can't watch the game.
If Nigel had satellite TV, he could watch/would be able to watch the game.
You are thinking of going away. I will miss you.
If you go away, I'll miss you.
I'm not rich so I have to work.
If I was/were rich, I wouldn't (have to) work.
I'm afraid of spiders and I can't pick it up.
If I wasn't afraid of spiders, I would pick it up.
I'd really like this vase, but I don't have enough money.
If I had enough money, I would buy that vase.
