I could seesaw you could seesaw he could seesaw we could seesaw you could seesaw they could seesaw
V-ing form
I could be seesawing you could be seesawing he could be seesawing we could be seesawing you could be seesawing they could be seesawing
Perfect
I could have seesawed you could have seesawed he could have seesawed we could have seesawed you could have seesawed they could have seesawed
V-ing perfect
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
I could not seesaw you could not seesaw he could not seesaw we could not seesaw you could not seesaw they could not seesaw
V-ing form
I could not be seesawing you could not be seesawing he could not be seesawing we could not be seesawing you could not be seesawing they could not be seesawing
Perfect
I could not have seesawed you could not have seesawed he could not have seesawed we could not have seesawed you could not have seesawed they could not have seesawed
V-ing perfect
I could not have been seesawing you could not have been seesawing he could not have been seesawing we could not have been seesawing you could not have been seesawing they could not have been seesawing
Interrogative form
Simple form
could I seesaw? could you seesaw? could he seesaw? could we seesaw? could you seesaw? could they seesaw?
V-ing form
could I be seesawing? could you be seesawing? could he be seesawing? could we be seesawing? could you be seesawing? could they be seesawing?
Perfect
could I have seesawed? could you have seesawed? could he have seesawed? could we have seesawed? could you have seesawed? could they have seesawed?
V-ing perfect
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
could I not seesaw? could you not seesaw? could he not seesaw? could we not seesaw? could you not seesaw? could they not seesaw?
V-ing form
could I not be seesawing? could you not be seesawing? could he not be seesawing? could we not be seesawing? could you not be seesawing? could they not be seesawing?
Perfect
could I not have seesawed? could you not have seesawed? could he not have seesawed? could we not have seesawed? could you not have seesawed? could they not have seesawed?
V-ing perfect
could I not have been seesawing? could you not have been seesawing? could he not have been seesawing? could we not have been seesawing? could you not have been seesawing? could they not have been seesawing?