must backslide
Verbo irregular: backslide - backslid- backslid, backslidden

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must backslide
you must backslide
she must backslide
we must backslide
you must backslide
they must backslide 	I must be backsliding
you must be backsliding
she must be backsliding
we must be backsliding
you must be backsliding
they must be backsliding	I must have backslid, backslidden
you must have backslid, backslidden
she must have backslid, backslidden
we must have backslid, backslidden
you must have backslid, backslidden
they must have backslid, backslidden	I must have been backsliding
you must have been backsliding
she must have been backsliding
we must have been backsliding
you must have been backsliding
they must have been backsliding	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not backslide
you must not backslide
she must not backslide
we must not backslide
you must not backslide
they must not backslide 	I must not be backsliding
you must not be backsliding
she must not be backsliding
we must not be backsliding
you must not be backsliding
they must not be backsliding	I must not have backslid, backslidden
you must not have backslid, backslidden
she must not have backslid, backslidden
we must not have backslid, backslidden
you must not have backslid, backslidden
they must not have backslid, backslidden	I must not have been backsliding
you must not have been backsliding
she must not have been backsliding
we must not have been backsliding
you must not have been backsliding
they must not have been backsliding	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I backslide?
must you backslide?
must she backslide?
must we backslide?
must you backslide?
must they backslide? 	must I be backsliding?
must you be backsliding?
must she be backsliding?
must we be backsliding?
must you be backsliding?
must they be backsliding? 	must I have backslid, backslidden?
must you have backslid, backslidden?
must she have backslid, backslidden?
must we have backslid, backslidden?
must you have backslid, backslidden?
must they have backslid, backslidden? 	must I have been backsliding?
must you have been backsliding?
must she have been backsliding?
must we have been backsliding?
must you have been backsliding?
must they have been backsliding? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not backslide?
must you not backslide?
must she not backslide?
must we not backslide?
must you not backslide?
must they not backslide? 	must I not be backsliding?
must you not be backsliding?
must she not be backsliding?
must we not be backsliding?
must you not be backsliding?
must they not be backsliding? 	must I not have backslid, backslidden?
must you not have backslid, backslidden?
must she not have backslid, backslidden?
must we not have backslid, backslidden?
must you not have backslid, backslidden?
must they not have backslid, backslidden? 	must I not have been backsliding?
must you not have been backsliding?
must she not have been backsliding?
must we not have been backsliding?
must you not have been backsliding?
must they not have been backsliding?