If you saw my sister, you'd certainly know she was pregnant.
If we were warriors, we wouldn't have done that.
but we're not, and we did
If you had helped me, I wouldn't be going to Washington next week.
but you didn't, and I am
If you had given me that kind of food, I would be strong today.
(but you didn't, and I'm not)
If you had loved me, I would have been so happy.
(but you didn't, and I wasn't)
If you loved me, I would be so happy.
(but you don't, and I'm not)
If it rained tomorrow, they'd do a dance.
(but it won't, and they won't)
If it were raining, (then) I couldn't go.