must drift
Verbo regular: drift - drifted- drifted

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must drift
you must drift
she must drift
we must drift
you must drift
they must drift 	I must be drifting
you must be drifting
she must be drifting
we must be drifting
you must be drifting
they must be drifting	I must have drifted
you must have drifted
she 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
she must have been drifting
we must have been drifting
you must have been drifting
they must have been drifting	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not drift
you must not drift
she 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
she 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
she 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
she 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 com V-ing 	Perfeito 	Perfeito com V-ing 	
must I drift?
must you drift?
must she drift?
must we drift?
must you drift?
must they drift? 	must I be drifting?
must you be drifting?
must she be drifting?
must we be drifting?
must you be drifting?
must they be drifting? 	must I have drifted?
must you have drifted?
must she 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 she have been drifting?
must we have been drifting?
must you have been drifting?
must they have been drifting? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not drift?
must you not drift?
must she 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 she 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 she 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 she not have been drifting?
must we not have been drifting?
must you not have been drifting?
must they not have been drifting?