I can describe you can describe she can describe we can describe you can describe they can describe
V-ing form
I can be describing you can be describing she can be describing we can be describing you can be describing they can be describing
Perfect
I can have described you can have described she can have described we can have described you can have described they can have described
V-ing perfect
I can have been describing you can have been describing she can have been describing we can have been describing you can have been describing they can have been describing
Negation
Simple form
I cannot describe you cannot describe she cannot describe we cannot describe you cannot describe they cannot describe
V-ing form
I cannot be describing you cannot be describing she cannot be describing we cannot be describing you cannot be describing they cannot be describing
Perfect
I cannot have described you cannot have described she cannot have described we cannot have described you cannot have described they cannot have described
V-ing perfect
I cannot have been describing you cannot have been describing she cannot have been describing we cannot have been describing you cannot have been describing they cannot have been describing
Interrogative form
Simple form
can I describe? can you describe? can she describe? can we describe? can you describe? can they describe?
V-ing form
can I be describing? can you be describing? can she be describing? can we be describing? can you be describing? can they be describing?
Perfect
can I have described? can you have described? can she have described? can we have described? can you have described? can they have described?
V-ing perfect
can I have been describing? can you have been describing? can she have been describing? can we have been describing? can you have been describing? can they have been describing?
Interro-negative form
Simple form
can I not describe? can you not describe? can she not describe? can we not describe? can you not describe? can they not describe?
V-ing form
can I not be describing? can you not be describing? can she not be describing? can we not be describing? can you not be describing? can they not be describing?
Perfect
can I not have described? can you not have described? can she not have described? can we not have described? can you not have described? can they not have described?
V-ing perfect
can I not have been describing? can you not have been describing? can she not have been describing? can we not have been describing? can you not have been describing? can they not have been describing?