must contend
Verbo regular: contend - contended- contended

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must contend
you must contend
she must contend
we must contend
you must contend
they must contend 	I must be contending
you must be contending
she must be contending
we must be contending
you must be contending
they must be contending	I must have contended
you must have contended
she must have contended
we must have contended
you must have contended
they must have contended	I must have been contending
you must have been contending
she must have been contending
we must have been contending
you must have been contending
they must have been contending	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't contend
you mustn't contend
she mustn't contend
we mustn't contend
you mustn't contend
they mustn't contend 	I mustn't be contending
you mustn't be contending
she mustn't be contending
we mustn't be contending
you mustn't be contending
they mustn't be contending	I mustn't have contended
you mustn't have contended
she mustn't have contended
we mustn't have contended
you mustn't have contended
they mustn't have contended	I mustn't have been contending
you mustn't have been contending
she mustn't have been contending
we mustn't have been contending
you mustn't have been contending
they mustn't have been contending	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I contend?
must you contend?
must she contend?
must we contend?
must you contend?
must they contend? 	must I be contending?
must you be contending?
must she be contending?
must we be contending?
must you be contending?
must they be contending? 	must I have contended?
must you have contended?
must she have contended?
must we have contended?
must you have contended?
must they have contended? 	must I have been contending?
must you have been contending?
must she have been contending?
must we have been contending?
must you have been contending?
must they have been contending? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I contend?
mustn't you contend?
mustn't she contend?
mustn't we contend?
mustn't you contend?
mustn't they contend? 	mustn't I be contending?
mustn't you be contending?
mustn't she be contending?
mustn't we be contending?
mustn't you be contending?
mustn't they be contending? 	mustn't I have contended?
mustn't you have contended?
mustn't she have contended?
mustn't we have contended?
mustn't you have contended?
mustn't they have contended? 	mustn't I have been contending?
mustn't you have been contending?
mustn't she have been contending?
mustn't we have been contending?
mustn't you have been contending?
mustn't they have been contending?