a. augent 
b. augentur 
c. augebant 
d. augebantur 
e. augebunt 
f. augebuntur 
g. aucti sunt 
h. auxerunt 
i. auctae erant 
j. auxerant 
k. aucta erunt 
l. auxerint 
1. They will increase 
2. They are increased 
3. They will have increased 
4. They have increased 
5. They used to increase 
6. They had been increased 
7. They were increased 
8. They have been increased 
9. They increase 
10. They will be increased 
11. They will have been increased 
12. They had increased 

What I've got so far: 
1. e 
2. b 
3. I 
4. c or h? 
5. 
6. 
7. 
8. d 
9. a 
10. 
11. f 
12. j 

I'm not quite sure. Any help is greatly appreciated. x