If Alice (didn’t take/hadn’t taken) a tablet, she (would have/have had) a splitting headache now.
If Ann (made/had made) notes during the lectures in winter, she would (be able/have been able) to use those materials for her exams tomorrow.
If the door (didn't squeak/hadn't squeaked) when you were leaving the room,you wouldn't(wake/have woken)the baby.
But for John's help we wouldn't (get/have got)the job.