could slump
Regular verb: slump - slumped- slumped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could slump
you could slump
she could slump
we could slump
you could slump
they could slump 	I could be slumping
you could be slumping
she could be slumping
we could be slumping
you could be slumping
they could be slumping	I could have slumped
you could have slumped
she could have slumped
we could have slumped
you could have slumped
they could have slumped	I could have been slumping
you could have been slumping
she could have been slumping
we could have been slumping
you could have been slumping
they could have been slumping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't slump
you couldn't slump
she couldn't slump
we couldn't slump
you couldn't slump
they couldn't slump 	I couldn't be slumping
you couldn't be slumping
she couldn't be slumping
we couldn't be slumping
you couldn't be slumping
they couldn't be slumping	I couldn't have slumped
you couldn't have slumped
she couldn't have slumped
we couldn't have slumped
you couldn't have slumped
they couldn't have slumped	I couldn't have been slumping
you couldn't have been slumping
she couldn't have been slumping
we couldn't have been slumping
you couldn't have been slumping
they couldn't have been slumping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I slump?
could you slump?
could she slump?
could we slump?
could you slump?
could they slump? 	could I be slumping?
could you be slumping?
could she be slumping?
could we be slumping?
could you be slumping?
could they be slumping? 	could I have slumped?
could you have slumped?
could she have slumped?
could we have slumped?
could you have slumped?
could they have slumped? 	could I have been slumping?
could you have been slumping?
could she have been slumping?
could we have been slumping?
could you have been slumping?
could they have been slumping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I slump?
couldn't you slump?
couldn't she slump?
couldn't we slump?
couldn't you slump?
couldn't they slump? 	couldn't I be slumping?
couldn't you be slumping?
couldn't she be slumping?
couldn't we be slumping?
couldn't you be slumping?
couldn't they be slumping? 	couldn't I have slumped?
couldn't you have slumped?
couldn't she have slumped?
couldn't we have slumped?
couldn't you have slumped?
couldn't they have slumped? 	couldn't I have been slumping?
couldn't you have been slumping?
couldn't she have been slumping?
couldn't we have been slumping?
couldn't you have been slumping?
couldn't they have been slumping?