I could beam you could beam she could beam we could beam you could beam they could beam
V-ing form
I could be beaming you could be beaming she could be beaming we could be beaming you could be beaming they could be beaming
Perfect
I could have beamed you could have beamed she could have beamed we could have beamed you could have beamed they could have beamed
V-ing perfect
I could have been beaming you could have been beaming she could have been beaming we could have been beaming you could have been beaming they could have been beaming
Negation
Simple form
I could not beam you could not beam she could not beam we could not beam you could not beam they could not beam
V-ing form
I could not be beaming you could not be beaming she could not be beaming we could not be beaming you could not be beaming they could not be beaming
Perfect
I could not have beamed you could not have beamed she could not have beamed we could not have beamed you could not have beamed they could not have beamed
V-ing perfect
I could not have been beaming you could not have been beaming she could not have been beaming we could not have been beaming you could not have been beaming they could not have been beaming
Interrogative form
Simple form
could I beam? could you beam? could she beam? could we beam? could you beam? could they beam?
V-ing form
could I be beaming? could you be beaming? could she be beaming? could we be beaming? could you be beaming? could they be beaming?
Perfect
could I have beamed? could you have beamed? could she have beamed? could we have beamed? could you have beamed? could they have beamed?
V-ing perfect
could I have been beaming? could you have been beaming? could she have been beaming? could we have been beaming? could you have been beaming? could they have been beaming?
Interro-negative form
Simple form
could I not beam? could you not beam? could she not beam? could we not beam? could you not beam? could they not beam?
V-ing form
could I not be beaming? could you not be beaming? could she not be beaming? could we not be beaming? could you not be beaming? could they not be beaming?
Perfect
could I not have beamed? could you not have beamed? could she not have beamed? could we not have beamed? could you not have beamed? could they not have beamed?
V-ing perfect
could I not have been beaming? could you not have been beaming? could she not have been beaming? could we not have been beaming? could you not have been beaming? could they not have been beaming?