I won't organise the party unless you arrange the food (if)
If you don't arrange the food, I won't organise the party
I think it would be a good idea to speak to the manager first ( I would...)
I would speak to the manager first if I were you
If you do the washing up, I'll make the coffee (provided)
I've been so happy since I met you (if)
If I hadn't met you , I wouldn' be so happy
She has a terrible headache!
She wishes she didn't have a terrible headache
Jim missed the plane and his opportunity to do business (If only)
If only Jim hadn't missed the plane and his opportunity to do business
I can't stand her singing so loud!!
I wish she wouldn't sing so loud!!
