Second conditional: if+past, would+infinitive

Use if + past, would + infinitive to talk about an improbable / impossible or hypothetical future situation and its consequence.
If a bear attacked me, I'd run away. (I'm imagining this situation. It's very improbable.)
If I didn't have children, I wouldn't live in the country.
Would you take the manager's job if they offered it to you?

Would / Wouldn't is the same for all persons.

The contractions are would-'d and would not-wouldn't.

The if phrase can come first or second. If I saw a bear, I'd run. I'd run if I saw a bear.

Remember with can, use could + infinitive, not would can. If I had a car, we could drive there.

!! With the verb BE you can use were (instead(en lugar) of was) after I and he/she/it.
Use were (not was) in the expression If I were you... We often use this expression for advice.