must skip
Verbo regular: skip - skipped- skipped

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must skip
you must skip
he must skip
we must skip
you must skip
they must skip 	I must be skipping
you must be skipping
he must be skipping
we must be skipping
you must be skipping
they must be skipping	I must have skipped
you must have skipped
he must have skipped
we must have skipped
you must have skipped
they must have skipped	I must have been skipping
you must have been skipping
he must have been skipping
we must have been skipping
you must have been skipping
they must have been skipping	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not skip
you must not skip
he must not skip
we must not skip
you must not skip
they must not skip 	I must not be skipping
you must not be skipping
he must not be skipping
we must not be skipping
you must not be skipping
they must not be skipping	I must not have skipped
you must not have skipped
he must not have skipped
we must not have skipped
you must not have skipped
they must not have skipped	I must not have been skipping
you must not have been skipping
he must not have been skipping
we must not have been skipping
you must not have been skipping
they must not have been skipping	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I skip?
must you skip?
must he skip?
must we skip?
must you skip?
must they skip? 	must I be skipping?
must you be skipping?
must he be skipping?
must we be skipping?
must you be skipping?
must they be skipping? 	must I have skipped?
must you have skipped?
must he have skipped?
must we have skipped?
must you have skipped?
must they have skipped? 	must I have been skipping?
must you have been skipping?
must he have been skipping?
must we have been skipping?
must you have been skipping?
must they have been skipping? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not skip?
must you not skip?
must he not skip?
must we not skip?
must you not skip?
must they not skip? 	must I not be skipping?
must you not be skipping?
must he not be skipping?
must we not be skipping?
must you not be skipping?
must they not be skipping? 	must I not have skipped?
must you not have skipped?
must he not have skipped?
must we not have skipped?
must you not have skipped?
must they not have skipped? 	must I not have been skipping?
must you not have been skipping?
must he not have been skipping?
must we not have been skipping?
must you not have been skipping?
must they not have been skipping?