must fork
Verbo regular: fork - forked- forked

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must fork
you must fork
she must fork
we must fork
you must fork
they must fork 	I must be forking
you must be forking
she must be forking
we must be forking
you must be forking
they must be forking	I must have forked
you must have forked
she must have forked
we must have forked
you must have forked
they must have forked	I must have been forking
you must have been forking
she must have been forking
we must have been forking
you must have been forking
they must have been forking	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not fork
you must not fork
she must not fork
we must not fork
you must not fork
they must not fork 	I must not be forking
you must not be forking
she must not be forking
we must not be forking
you must not be forking
they must not be forking	I must not have forked
you must not have forked
she must not have forked
we must not have forked
you must not have forked
they must not have forked	I must not have been forking
you must not have been forking
she must not have been forking
we must not have been forking
you must not have been forking
they must not have been forking	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I fork?
must you fork?
must she fork?
must we fork?
must you fork?
must they fork? 	must I be forking?
must you be forking?
must she be forking?
must we be forking?
must you be forking?
must they be forking? 	must I have forked?
must you have forked?
must she have forked?
must we have forked?
must you have forked?
must they have forked? 	must I have been forking?
must you have been forking?
must she have been forking?
must we have been forking?
must you have been forking?
must they have been forking? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not fork?
must you not fork?
must she not fork?
must we not fork?
must you not fork?
must they not fork? 	must I not be forking?
must you not be forking?
must she not be forking?
must we not be forking?
must you not be forking?
must they not be forking? 	must I not have forked?
must you not have forked?
must she not have forked?
must we not have forked?
must you not have forked?
must they not have forked? 	must I not have been forking?
must you not have been forking?
must she not have been forking?
must we not have been forking?
must you not have been forking?
must they not have been forking?