can burden
Verbo regular: burden - burdened- burdened

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can burden
you can burden
he can burden
we can burden
you can burden
they can burden 	I can be burdening
you can be burdening
he can be burdening
we can be burdening
you can be burdening
they can be burdening	I can have burdened
you can have burdened
he can have burdened
we can have burdened
you can have burdened
they can have burdened	I can have been burdening
you can have been burdening
he can have been burdening
we can have been burdening
you can have been burdening
they can have been burdening	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I cannot burden
you cannot burden
he cannot burden
we cannot burden
you cannot burden
they cannot burden 	I cannot be burdening
you cannot be burdening
he cannot be burdening
we cannot be burdening
you cannot be burdening
they cannot be burdening	I cannot have burdened
you cannot have burdened
he cannot have burdened
we cannot have burdened
you cannot have burdened
they cannot have burdened	I cannot have been burdening
you cannot have been burdening
he cannot have been burdening
we cannot have been burdening
you cannot have been burdening
they cannot have been burdening	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I burden?
can you burden?
can he burden?
can we burden?
can you burden?
can they burden? 	can I be burdening?
can you be burdening?
can he be burdening?
can we be burdening?
can you be burdening?
can they be burdening? 	can I have burdened?
can you have burdened?
can he have burdened?
can we have burdened?
can you have burdened?
can they have burdened? 	can I have been burdening?
can you have been burdening?
can he have been burdening?
can we have been burdening?
can you have been burdening?
can they have been burdening? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I not burden?
can you not burden?
can he not burden?
can we not burden?
can you not burden?
can they not burden? 	can I not be burdening?
can you not be burdening?
can he not be burdening?
can we not be burdening?
can you not be burdening?
can they not be burdening? 	can I not have burdened?
can you not have burdened?
can he not have burdened?
can we not have burdened?
can you not have burdened?
can they not have burdened? 	can I not have been burdening?
can you not have been burdening?
can he not have been burdening?
can we not have been burdening?
can you not have been burdening?
can they not have been burdening?