I could deadhead you could deadhead she could deadhead we could deadhead you could deadhead they could deadhead
V-ing form
I could be deadheading you could be deadheading she could be deadheading we could be deadheading you could be deadheading they could be deadheading
Perfect
I could have deadheaded you could have deadheaded she could have deadheaded we could have deadheaded you could have deadheaded they could have deadheaded
V-ing perfect
I could have been deadheading you could have been deadheading she could have been deadheading we could have been deadheading you could have been deadheading they could have been deadheading
Negation
Simple form
I could not deadhead you could not deadhead she could not deadhead we could not deadhead you could not deadhead they could not deadhead
V-ing form
I could not be deadheading you could not be deadheading she could not be deadheading we could not be deadheading you could not be deadheading they could not be deadheading
Perfect
I could not have deadheaded you could not have deadheaded she could not have deadheaded we could not have deadheaded you could not have deadheaded they could not have deadheaded
V-ing perfect
I could not have been deadheading you could not have been deadheading she could not have been deadheading we could not have been deadheading you could not have been deadheading they could not have been deadheading
Interrogative form
Simple form
could I deadhead? could you deadhead? could she deadhead? could we deadhead? could you deadhead? could they deadhead?
V-ing form
could I be deadheading? could you be deadheading? could she be deadheading? could we be deadheading? could you be deadheading? could they be deadheading?
Perfect
could I have deadheaded? could you have deadheaded? could she have deadheaded? could we have deadheaded? could you have deadheaded? could they have deadheaded?
V-ing perfect
could I have been deadheading? could you have been deadheading? could she have been deadheading? could we have been deadheading? could you have been deadheading? could they have been deadheading?
Interro-negative form
Simple form
could I not deadhead? could you not deadhead? could she not deadhead? could we not deadhead? could you not deadhead? could they not deadhead?
V-ing form
could I not be deadheading? could you not be deadheading? could she not be deadheading? could we not be deadheading? could you not be deadheading? could they not be deadheading?
Perfect
could I not have deadheaded? could you not have deadheaded? could she not have deadheaded? could we not have deadheaded? could you not have deadheaded? could they not have deadheaded?
V-ing perfect
could I not have been deadheading? could you not have been deadheading? could she not have been deadheading? could we not have been deadheading? could you not have been deadheading? could they not have been deadheading?