I could strip you could strip she could strip we could strip you could strip they could strip
V-ing form
I could be stripping you could be stripping she could be stripping we could be stripping you could be stripping they could be stripping
Perfect
I could have stripped you could have stripped she could have stripped we could have stripped you could have stripped they could have stripped
V-ing perfect
I could have been stripping you could have been stripping she could have been stripping we could have been stripping you could have been stripping they could have been stripping
Negation
Simple form
I could not strip you could not strip she could not strip we could not strip you could not strip they could not strip
V-ing form
I could not be stripping you could not be stripping she could not be stripping we could not be stripping you could not be stripping they could not be stripping
Perfect
I could not have stripped you could not have stripped she could not have stripped we could not have stripped you could not have stripped they could not have stripped
V-ing perfect
I could not have been stripping you could not have been stripping she could not have been stripping we could not have been stripping you could not have been stripping they could not have been stripping
Interrogative form
Simple form
could I strip? could you strip? could she strip? could we strip? could you strip? could they strip?
V-ing form
could I be stripping? could you be stripping? could she be stripping? could we be stripping? could you be stripping? could they be stripping?
Perfect
could I have stripped? could you have stripped? could she have stripped? could we have stripped? could you have stripped? could they have stripped?
V-ing perfect
could I have been stripping? could you have been stripping? could she have been stripping? could we have been stripping? could you have been stripping? could they have been stripping?
Interro-negative form
Simple form
could I not strip? could you not strip? could she not strip? could we not strip? could you not strip? could they not strip?
V-ing form
could I not be stripping? could you not be stripping? could she not be stripping? could we not be stripping? could you not be stripping? could they not be stripping?
Perfect
could I not have stripped? could you not have stripped? could she not have stripped? could we not have stripped? could you not have stripped? could they not have stripped?
V-ing perfect
could I not have been stripping? could you not have been stripping? could she not have been stripping? could we not have been stripping? could you not have been stripping? could they not have been stripping?