should grump
Regular verb: grump - grumped- grumped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should grump
you should grump
she should grump
we should grump
you should grump
they should grump 	I should be grumping
you should be grumping
she should be grumping
we should be grumping
you should be grumping
they should be grumping	I should have grumped
you should have grumped
she should have grumped
we should have grumped
you should have grumped
they should have grumped	I should have been grumping
you should have been grumping
she should have been grumping
we should have been grumping
you should have been grumping
they should have been grumping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should not grump
you should not grump
she should not grump
we should not grump
you should not grump
they should not grump 	I should not be grumping
you should not be grumping
she should not be grumping
we should not be grumping
you should not be grumping
they should not be grumping	I should not have grumped
you should not have grumped
she should not have grumped
we should not have grumped
you should not have grumped
they should not have grumped	I should not have been grumping
you should not have been grumping
she should not have been grumping
we should not have been grumping
you should not have been grumping
they should not have been grumping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I grump?
should you grump?
should she grump?
should we grump?
should you grump?
should they grump? 	should I be grumping?
should you be grumping?
should she be grumping?
should we be grumping?
should you be grumping?
should they be grumping? 	should I have grumped?
should you have grumped?
should she have grumped?
should we have grumped?
should you have grumped?
should they have grumped? 	should I have been grumping?
should you have been grumping?
should she have been grumping?
should we have been grumping?
should you have been grumping?
should they have been grumping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I not grump?
should you not grump?
should she not grump?
should we not grump?
should you not grump?
should they not grump? 	should I not be grumping?
should you not be grumping?
should she not be grumping?
should we not be grumping?
should you not be grumping?
should they not be grumping? 	should I not have grumped?
should you not have grumped?
should she not have grumped?
should we not have grumped?
should you not have grumped?
should they not have grumped? 	should I not have been grumping?
should you not have been grumping?
should she not have been grumping?
should we not have been grumping?
should you not have been grumping?
should they not have been grumping?