can contend
Verbo regular: contend - contended- contended

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can contend
you can contend
he can contend
we can contend
you can contend
they can contend 	I can be contending
you can be contending
he can be contending
we can be contending
you can be contending
they can be contending	I can have contended
you can have contended
he can have contended
we can have contended
you can have contended
they can have contended	I can have been contending
you can have been contending
he can have been contending
we can have been contending
you can have been contending
they can have been contending	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can't contend
you can't contend
he can't contend
we can't contend
you can't contend
they can't contend 	I can't be contending
you can't be contending
he can't be contending
we can't be contending
you can't be contending
they can't be contending	I can't have contended
you can't have contended
he can't have contended
we can't have contended
you can't have contended
they can't have contended	I can't have been contending
you can't have been contending
he can't have been contending
we can't have been contending
you can't have been contending
they can't have been contending	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I contend?
can you contend?
can he contend?
can we contend?
can you contend?
can they contend? 	can I be contending?
can you be contending?
can he be contending?
can we be contending?
can you be contending?
can they be contending? 	can I have contended?
can you have contended?
can he have contended?
can we have contended?
can you have contended?
can they have contended? 	can I have been contending?
can you have been contending?
can he have been contending?
can we have been contending?
can you have been contending?
can they have been contending? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can't I contend?
can't you contend?
can't he contend?
can't we contend?
can't you contend?
can't they contend? 	can't I be contending?
can't you be contending?
can't he be contending?
can't we be contending?
can't you be contending?
can't they be contending? 	can't I have contended?
can't you have contended?
can't he have contended?
can't we have contended?
can't you have contended?
can't they have contended? 	can't I have been contending?
can't you have been contending?
can't he have been contending?
can't we have been contending?
can't you have been contending?
can't they have been contending?