English verb conjugation
CAN BUILD

Irregular verb: build - built - built

Affirmation

Simple form	V-ing form
I can build you can build he can build we can build you can build they can build	I can be building you can be building he can be building we can be building you can be building they can be building
Perfect	V-ing perfect
I can have built you can have built he can have built we can have built you can have built they can have built	I can have been building you can have been building he can have been building we can have been building you can have been building they can have been building

Negation

Simple form	V-ing form
I can't build you can't build he can't build we can't build you can't build they can't build	I can't be building you can't be building he can't be building we can't be building you can't be building they can't be building
Perfect	V-ing perfect
I can't have built you can't have built he can't have built we can't have built you can't have built they can't have built	I can't have been building you can't have been building he can't have been building we can't have been building you can't have been building they can't have been building

Interrogative form

Simple form	V-ing form
can I build? can you build? can he build? can we build? can you build? can they build?	can I be building? can you be building? can he be building? can we be building? can you be building? can they be building?
Perfect	V-ing perfect
can I have built? can you have built? can he have built? can we have built? can you have built? can they have built?	can I have been building? can you have been building? can he have been building? can we have been building? can you have been building? can they have been building?

Interro-negative form

Simple form	V-ing form
can't I build? can't you build? can't he build? can't we build? can't you build? can't they build?	can't I be building? can't you be building? can't he be building? can't we be building? can't you be building? can't they be building?
Perfect	V-ing perfect
can't I have built? can't you have built? can't he have built? can't we have built? can't you have built? can't they have built?	can't I have been building? can't you have been building? can't he have been building? can't we have been building? can't you have been building? can't they have been building?