I can build you can build she can build we can build you can build they can build
Forma con V-ing
I can be building you can be building she can be building we can be building you can be building they can be building
Perfecto
I can have built you can have built she can have built we can have built you can have built they can have built
Perfecto con V-ing
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
Negación
Forma simple
I cannot build you cannot build she cannot build we cannot build you cannot build they cannot build
Forma con V-ing
I cannot be building you cannot be building she cannot be building we cannot be building you cannot be building they cannot be building
Perfecto
I cannot have built you cannot have built she cannot have built we cannot have built you cannot have built they cannot have built
Perfecto con V-ing
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
Forma interrogativa
Forma simple
can I build? can you build? can she build? can we build? can you build? can they build?
Forma con V-ing
can I be building? can you be building? can she be building? can we be building? can you be building? can they be building?
Perfecto
can I have built? can you have built? can she have built? can we have built? can you have built? can they have built?
Perfecto con V-ing
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?
Forma interro-negativa
Forma simple
can I not build? can you not build? can she not build? can we not build? can you not build? can they not build?
Forma con V-ing
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?
Perfecto
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?
Perfecto con V-ing
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?