Question

Answer 1

was 
were 
wasn't 
weren't
Was 
Were 
wasn't 
were 
2/ was - wasn't - were - were - weren't - was - was - weren't 
4/ couldn't - couldn't - buy - couldn't - use

Answer 2

1)

a) was

b) were

c) wasn't

d) weren't

e) Was

f) Were

g) wasn't

h) were

2)

1. was

2. wasn't

3. were

4. Were

5. Was/ was

6. weren't/ were

4)

1. couldn't

2. could

3. buy

4. could

5. use