I would have ... for/to you
I would have told you that.
I could have helped you.
Ich hätte dir sagen sollen, dass du keinen Zucker mehr zu kaufen brauchst.
I should have told you that you don’t need to buy any more sugar.
I would have helped you.
Ich hätte dir das eher geben sollen.
I should have given it to you sooner.
Ich hätte dir gezeigt, wie das geht, hättest du mich gefragt.
I would have shown you how to do it if you had asked me.
Ich hätte dir nie mein Fahrrad leihen sollen.
I never should have lent you my bike.
Ich hätte dir das gezeigt, wie das geht, wenn du mich darum gebeten hättest.
I would have shown you how to do it if you had asked me.