A. walk
B. walks
C. walked
D. walking
A. finish
B. finished
C. have finished
D. had finished
A. go
B. goes
C. went
D. gone
A. is
B. was
C. were
D. be
A. has
B. have
C. had
D. was
A. is
B. was
C. were
D. be
A. is
B. are
C. was
D. were
A. is
B. was
C. were
D. be
A. is
B. are
C. was
D. were
A. do
B. does
C. did
D. has