must chain
Verbo regular: chain - chained- chained

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must chain
you must chain
he must chain
we must chain
you must chain
they must chain 	I must be chaining
you must be chaining
he must be chaining
we must be chaining
you must be chaining
they must be chaining	I must have chained
you must have chained
he must have chained
we must have chained
you must have chained
they must have chained	I must have been chaining
you must have been chaining
he must have been chaining
we must have been chaining
you must have been chaining
they must have been chaining	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not chain
you must not chain
he must not chain
we must not chain
you must not chain
they must not chain 	I must not be chaining
you must not be chaining
he must not be chaining
we must not be chaining
you must not be chaining
they must not be chaining	I must not have chained
you must not have chained
he must not have chained
we must not have chained
you must not have chained
they must not have chained	I must not have been chaining
you must not have been chaining
he must not have been chaining
we must not have been chaining
you must not have been chaining
they must not have been chaining	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I chain?
must you chain?
must he chain?
must we chain?
must you chain?
must they chain? 	must I be chaining?
must you be chaining?
must he be chaining?
must we be chaining?
must you be chaining?
must they be chaining? 	must I have chained?
must you have chained?
must he have chained?
must we have chained?
must you have chained?
must they have chained? 	must I have been chaining?
must you have been chaining?
must he have been chaining?
must we have been chaining?
must you have been chaining?
must they have been chaining? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not chain?
must you not chain?
must he not chain?
must we not chain?
must you not chain?
must they not chain? 	must I not be chaining?
must you not be chaining?
must he not be chaining?
must we not be chaining?
must you not be chaining?
must they not be chaining? 	must I not have chained?
must you not have chained?
must he not have chained?
must we not have chained?
must you not have chained?
must they not have chained? 	must I not have been chaining?
must you not have been chaining?
must he not have been chaining?
must we not have been chaining?
must you not have been chaining?
must they not have been chaining?