must drift
Verbo regular: drift - drifted- drifted

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must drift
you must drift
he must drift
we must drift
you must drift
they must drift 	I must be drifting
you must be drifting
he must be drifting
we must be drifting
you must be drifting
they must be drifting	I must have drifted
you must have drifted
he must have drifted
we must have drifted
you must have drifted
they must have drifted	I must have been drifting
you must have been drifting
he must have been drifting
we must have been drifting
you must have been drifting
they must have been drifting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not drift
you must not drift
he must not drift
we must not drift
you must not drift
they must not drift 	I must not be drifting
you must not be drifting
he must not be drifting
we must not be drifting
you must not be drifting
they must not be drifting	I must not have drifted
you must not have drifted
he must not have drifted
we must not have drifted
you must not have drifted
they must not have drifted	I must not have been drifting
you must not have been drifting
he must not have been drifting
we must not have been drifting
you must not have been drifting
they must not have been drifting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I drift?
must you drift?
must he drift?
must we drift?
must you drift?
must they drift? 	must I be drifting?
must you be drifting?
must he be drifting?
must we be drifting?
must you be drifting?
must they be drifting? 	must I have drifted?
must you have drifted?
must he have drifted?
must we have drifted?
must you have drifted?
must they have drifted? 	must I have been drifting?
must you have been drifting?
must he have been drifting?
must we have been drifting?
must you have been drifting?
must they have been drifting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not drift?
must you not drift?
must he not drift?
must we not drift?
must you not drift?
must they not drift? 	must I not be drifting?
must you not be drifting?
must he not be drifting?
must we not be drifting?
must you not be drifting?
must they not be drifting? 	must I not have drifted?
must you not have drifted?
must he not have drifted?
must we not have drifted?
must you not have drifted?
must they not have drifted? 	must I not have been drifting?
must you not have been drifting?
must he not have been drifting?
must we not have been drifting?
must you not have been drifting?
must they not have been drifting?