I can build you can build she can build we can build you can build they can build
V-ing form
I can be building you can be building she can be building we can be building you can be building they can be building
Perfect
I can have built you can have built she can have built we can have built you can have built they can have built
V-ing perfect
I can have been building you can have been building she can have been building we can have been building you can have been building they can have been building
Negation
Simple form
I cannot build you cannot build she cannot build we cannot build you cannot build they cannot build
V-ing form
I cannot be building you cannot be building she cannot be building we cannot be building you cannot be building they cannot be building
Perfect
I cannot have built you cannot have built she cannot have built we cannot have built you cannot have built they cannot have built
V-ing perfect
I cannot have been building you cannot have been building she cannot have been building we cannot have been building you cannot have been building they cannot have been building
Interrogative form
Simple form
can I build? can you build? can she build? can we build? can you build? can they build?
V-ing form
can I be building? can you be building? can she be building? can we be building? can you be building? can they be building?
Perfect
can I have built? can you have built? can she have built? can we have built? can you have built? can they have built?
V-ing perfect
can I have been building? can you have been building? can she have been building? can we have been building? can you have been building? can they have been building?
Interro-negative form
Simple form
can I not build? can you not build? can she not build? can we not build? can you not build? can they not build?
V-ing form
can I not be building? can you not be building? can she not be building? can we not be building? can you not be building? can they not be building?
Perfect
can I not have built? can you not have built? can she not have built? can we not have built? can you not have built? can they not have built?
V-ing perfect
can I not have been building? can you not have been building? can she not have been building? can we not have been building? can you not have been building? can they not have been building?