could slurp
Regular verb: slurp - slurped- slurped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could slurp
you could slurp
he could slurp
we could slurp
you could slurp
they could slurp 	I could be slurping
you could be slurping
he could be slurping
we could be slurping
you could be slurping
they could be slurping	I could have slurped
you could have slurped
he could have slurped
we could have slurped
you could have slurped
they could have slurped	I could have been slurping
you could have been slurping
he could have been slurping
we could have been slurping
you could have been slurping
they could have been slurping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't slurp
you couldn't slurp
he couldn't slurp
we couldn't slurp
you couldn't slurp
they couldn't slurp 	I couldn't be slurping
you couldn't be slurping
he couldn't be slurping
we couldn't be slurping
you couldn't be slurping
they couldn't be slurping	I couldn't have slurped
you couldn't have slurped
he couldn't have slurped
we couldn't have slurped
you couldn't have slurped
they couldn't have slurped	I couldn't have been slurping
you couldn't have been slurping
he couldn't have been slurping
we couldn't have been slurping
you couldn't have been slurping
they couldn't have been slurping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I slurp?
could you slurp?
could he slurp?
could we slurp?
could you slurp?
could they slurp? 	could I be slurping?
could you be slurping?
could he be slurping?
could we be slurping?
could you be slurping?
could they be slurping? 	could I have slurped?
could you have slurped?
could he have slurped?
could we have slurped?
could you have slurped?
could they have slurped? 	could I have been slurping?
could you have been slurping?
could he have been slurping?
could we have been slurping?
could you have been slurping?
could they have been slurping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I slurp?
couldn't you slurp?
couldn't he slurp?
couldn't we slurp?
couldn't you slurp?
couldn't they slurp? 	couldn't I be slurping?
couldn't you be slurping?
couldn't he be slurping?
couldn't we be slurping?
couldn't you be slurping?
couldn't they be slurping? 	couldn't I have slurped?
couldn't you have slurped?
couldn't he have slurped?
couldn't we have slurped?
couldn't you have slurped?
couldn't they have slurped? 	couldn't I have been slurping?
couldn't you have been slurping?
couldn't he have been slurping?
couldn't we have been slurping?
couldn't you have been slurping?
couldn't they have been slurping?