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
she can burden
we can burden
you can burden
they can burden 	I can be burdening
you can be burdening
she can be burdening
we can be burdening
you can be burdening
they can be burdening	I can have burdened
you can have burdened
she 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
she 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
she cannot burden
we cannot burden
you cannot burden
they cannot burden 	I cannot be burdening
you cannot be burdening
she cannot be burdening
we cannot be burdening
you cannot be burdening
they cannot be burdening	I cannot have burdened
you cannot have burdened
she 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
she 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 she burden?
can we burden?
can you burden?
can they burden? 	can I be burdening?
can you be burdening?
can she be burdening?
can we be burdening?
can you be burdening?
can they be burdening? 	can I have burdened?
can you have burdened?
can she 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 she 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 she 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 she 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 she 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 she not have been burdening?
can we not have been burdening?
can you not have been burdening?
can they not have been burdening?