could seesaw
Regular verb: seesaw - seesawed- seesawed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could seesaw
you could seesaw
he could seesaw
we could seesaw
you could seesaw
they could seesaw 	I could be seesawing
you could be seesawing
he could be seesawing
we could be seesawing
you could be seesawing
they could be seesawing	I could have seesawed
you could have seesawed
he could have seesawed
we could have seesawed
you could have seesawed
they could have seesawed	I could have been seesawing
you could have been seesawing
he could have been seesawing
we could have been seesawing
you could have been seesawing
they could have been seesawing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't seesaw
you couldn't seesaw
he couldn't seesaw
we couldn't seesaw
you couldn't seesaw
they couldn't seesaw 	I couldn't be seesawing
you couldn't be seesawing
he couldn't be seesawing
we couldn't be seesawing
you couldn't be seesawing
they couldn't be seesawing	I couldn't have seesawed
you couldn't have seesawed
he couldn't have seesawed
we couldn't have seesawed
you couldn't have seesawed
they couldn't have seesawed	I couldn't have been seesawing
you couldn't have been seesawing
he couldn't have been seesawing
we couldn't have been seesawing
you couldn't have been seesawing
they couldn't have been seesawing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I seesaw?
could you seesaw?
could he seesaw?
could we seesaw?
could you seesaw?
could they seesaw? 	could I be seesawing?
could you be seesawing?
could he be seesawing?
could we be seesawing?
could you be seesawing?
could they be seesawing? 	could I have seesawed?
could you have seesawed?
could he have seesawed?
could we have seesawed?
could you have seesawed?
could they have seesawed? 	could I have been seesawing?
could you have been seesawing?
could he have been seesawing?
could we have been seesawing?
could you have been seesawing?
could they have been seesawing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I seesaw?
couldn't you seesaw?
couldn't he seesaw?
couldn't we seesaw?
couldn't you seesaw?
couldn't they seesaw? 	couldn't I be seesawing?
couldn't you be seesawing?
couldn't he be seesawing?
couldn't we be seesawing?
couldn't you be seesawing?
couldn't they be seesawing? 	couldn't I have seesawed?
couldn't you have seesawed?
couldn't he have seesawed?
couldn't we have seesawed?
couldn't you have seesawed?
couldn't they have seesawed? 	couldn't I have been seesawing?
couldn't you have been seesawing?
couldn't he have been seesawing?
couldn't we have been seesawing?
couldn't you have been seesawing?
couldn't they have been seesawing?