German	English
Das hättest du dir sparen können!	That was unnecessary!
Das hättest du nicht tun sollen.	You shouldn't have done that.
Das hättest du sehen sollen!	You should have seen it!
Das Mindeste wäre, dass du mich angerufen hättest.	You could have at least rung me up.
Das Mindeste wäre, dass du mich angerufen hättest.	The least you could have done was to call me.
du hattest	you had
Du hattest also Unrecht	So therefore you were wrong
Du hättest es besser wissen müssen	You ought to have known better
Du hättest nichts damit zu tun	It wouldn't involve you
Du hättest etw. tun sollen.	You should have done smth.
Hättest du das doch gleich gesagt!	Why didn't you tell me straightaway?
Sein Gesicht hättest du sehen müssen	You ought to have seen his face