I'd be grasping you'd be grasping he'd be grasping we'd be grasping you'd be grasping they'd be grasping
Perfect
I should've grasped you should've grasped he should've grasped we should've grasped you should've grasped they should've grasped
V-ing perfect
I should've been grasping you should've been grasping he should've been grasping we should've been grasping you should've been grasping they should've been grasping
Negation
Simple form
I shouldn't grasp you shouldn't grasp he shouldn't grasp we shouldn't grasp you shouldn't grasp they shouldn't grasp
V-ing form
I shouldn't be grasping you shouldn't be grasping he shouldn't be grasping we shouldn't be grasping you shouldn't be grasping they shouldn't be grasping
Perfect
I shouldn't have grasped you shouldn't have grasped he shouldn't have grasped we shouldn't have grasped you shouldn't have grasped they shouldn't have grasped
V-ing perfect
I shouldn't have been grasping you shouldn't have been grasping he shouldn't have been grasping we shouldn't have been grasping you shouldn't have been grasping they shouldn't have been grasping
Interrogative form
Simple form
should I grasp? should you grasp? should he grasp? should we grasp? should you grasp? should they grasp?
V-ing form
should I be grasping? should you be grasping? should he be grasping? should we be grasping? should you be grasping? should they be grasping?
Perfect
should I have grasped? should you have grasped? should he have grasped? should we have grasped? should you have grasped? should they have grasped?
V-ing perfect
should I have been grasping? should you have been grasping? should he have been grasping? should we have been grasping? should you have been grasping? should they have been grasping?
Interro-negative form
Simple form
shouldn't I grasp? shouldn't you grasp? shouldn't he grasp? shouldn't we grasp? shouldn't you grasp? shouldn't they grasp?
V-ing form
shouldn't I be grasping? shouldn't you be grasping? shouldn't he be grasping? shouldn't we be grasping? shouldn't you be grasping? shouldn't they be grasping?
Perfect
shouldn't I have grasped? shouldn't you have grasped? shouldn't he have grasped? shouldn't we have grasped? shouldn't you have grasped? shouldn't they have grasped?
V-ing perfect
shouldn't I have been grasping? shouldn't you have been grasping? shouldn't he have been grasping? shouldn't we have been grasping? shouldn't you have been grasping? shouldn't they have been grasping?