A am working - am writing

B have worked - write

C have worked - have writing

D have been working - am writing

A will call

B was going to call

C would call

D would have

A. am flying

B. will be flying

C. have flown

D. will have flown

A finish

B finished

C will finish

D had finished

A. has finished

B. was finished

C. would finished

D. had finished

A doesn't win

B didn't win

C hasn't won

D hadn't won

A have you home

B had you gone

C did you go

D were you going

A have left

B will leave

C will have left

D am leaving

A leave

B will leave

C have left

D am leaving

A has been

B was

C will be

D had been