If I don’t find Jack at home, I (leave) him a message.

If I had known it, I (come) earlier.

If he had not been so frustrated, he (not miss) the bus.

Had I time, I (study) Spanish.

If I were you, I (go) there myself.

If you heat water, it (boil).

If you had gone to the party, you (see) Alan.

If I were you, I (call) your mom.

If I could, I (cycle) a lot.