I could teem you could teem he could teem we could teem you could teem they could teem
V-ing form
I could be teeming you could be teeming he could be teeming we could be teeming you could be teeming they could be teeming
Perfect
I could have teemed you could have teemed he could have teemed we could have teemed you could have teemed they could have teemed
V-ing perfect
I could have been teeming you could have been teeming he could have been teeming we could have been teeming you could have been teeming they could have been teeming
Negation
Simple form
I could not teem you could not teem he could not teem we could not teem you could not teem they could not teem
V-ing form
I could not be teeming you could not be teeming he could not be teeming we could not be teeming you could not be teeming they could not be teeming
Perfect
I could not have teemed you could not have teemed he could not have teemed we could not have teemed you could not have teemed they could not have teemed
V-ing perfect
I could not have been teeming you could not have been teeming he could not have been teeming we could not have been teeming you could not have been teeming they could not have been teeming
Interrogative form
Simple form
could I teem? could you teem? could he teem? could we teem? could you teem? could they teem?
V-ing form
could I be teeming? could you be teeming? could he be teeming? could we be teeming? could you be teeming? could they be teeming?
Perfect
could I have teemed? could you have teemed? could he have teemed? could we have teemed? could you have teemed? could they have teemed?
V-ing perfect
could I have been teeming? could you have been teeming? could he have been teeming? could we have been teeming? could you have been teeming? could they have been teeming?
Interro-negative form
Simple form
could I not teem? could you not teem? could he not teem? could we not teem? could you not teem? could they not teem?
V-ing form
could I not be teeming? could you not be teeming? could he not be teeming? could we not be teeming? could you not be teeming? could they not be teeming?
Perfect
could I not have teemed? could you not have teemed? could he not have teemed? could we not have teemed? could you not have teemed? could they not have teemed?
V-ing perfect
could I not have been teeming? could you not have been teeming? could he not have been teeming? could we not have been teeming? could you not have been teeming? could they not have been teeming?