I should time you should time he should time we should time you should time they should time
V-ing form
I should be timing you should be timing he should be timing we should be timing you should be timing they should be timing
Perfect
I should have timed you should have timed he should have timed we should have timed you should have timed they should have timed
V-ing perfect
I should have been timing you should have been timing he should have been timing we should have been timing you should have been timing they should have been timing
Negation
Simple form
I should not time you should not time he should not time we should not time you should not time they should not time
V-ing form
I should not be timing you should not be timing he should not be timing we should not be timing you should not be timing they should not be timing
Perfect
I should not have timed you should not have timed he should not have timed we should not have timed you should not have timed they should not have timed
V-ing perfect
I should not have been timing you should not have been timing he should not have been timing we should not have been timing you should not have been timing they should not have been timing
Interrogative form
Simple form
should I time? should you time? should he time? should we time? should you time? should they time?
V-ing form
should I be timing? should you be timing? should he be timing? should we be timing? should you be timing? should they be timing?
Perfect
should I have timed? should you have timed? should he have timed? should we have timed? should you have timed? should they have timed?
V-ing perfect
should I have been timing? should you have been timing? should he have been timing? should we have been timing? should you have been timing? should they have been timing?
Interro-negative form
Simple form
should I not time? should you not time? should he not time? should we not time? should you not time? should they not time?
V-ing form
should I not be timing? should you not be timing? should he not be timing? should we not be timing? should you not be timing? should they not be timing?
Perfect
should I not have timed? should you not have timed? should he not have timed? should we not have timed? should you not have timed? should they not have timed?
V-ing perfect
should I not have been timing? should you not have been timing? should he not have been timing? should we not have been timing? should you not have been timing? should they not have been timing?