should grump
Regular verb: grump - grumped- grumped

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