I can build you can build she can build we can build you can build they can build
Forma com 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
Perfeito
I can have built you can have built she can have built we can have built you can have built they can have built
Perfeito com 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
Negação
Forma simple
I can't build you can't build she can't build we can't build you can't build they can't build
Forma com V-ing
I can't be building you can't be building she can't be building we can't be building you can't be building they can't be building
Perfeito
I can't have built you can't have built she can't have built we can't have built you can't have built they can't have built
Perfeito com V-ing
I can't have been building you can't have been building she can't have been building we can't have been building you can't have been building they can't 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 com 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?
Perfeito
can I have built? can you have built? can she have built? can we have built? can you have built? can they have built?
Perfeito com 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-Negação
Forma simple
can't I build? can't you build? can't she build? can't we build? can't you build? can't they build?
Forma com V-ing
can't I be building? can't you be building? can't she be building? can't we be building? can't you be building? can't they be building?
Perfeito
can't I have built? can't you have built? can't she have built? can't we have built? can't you have built? can't they have built?
Perfeito com V-ing
can't I have been building? can't you have been building? can't she have been building? can't we have been building? can't you have been building? can't they have been building?