1- class had already begun by the time i got there,so i had quiety taken aseat to the back.
2- she had burst into tears the moment he shouted the door.
3- his fingers had begun had begun to bleed as soon as he cut himself.
4-helost his new knife shortly after hehad bought it.
5-I had never seen any of picasso's paintings before i visited the art museum.
6-he began to read as soon as he had found aplace .
7- it already had already rained for haif an hour when hestouped out into the street.
8- the patienthad already died already by the time the doctor arrived. .
9-when emadentered the room ,the thiefhad already escaped.
10- when we had got home, night falled.
11-studentsdidn't under stand, until he had explainedthe lessson.
12- wecold not hear ourself until the aeroplane had taken off.
13-they didn't grow until the gardener had watered the plants.
14-his neghbors would not speak to him until he had apologized.
15-they weren't able to make the pudding until the maid had brought the eggs.