must clean
Verbo regular: clean - cleaned- cleaned

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must clean
you must clean
she must clean
we must clean
you must clean
they must clean 	I must be cleaning
you must be cleaning
she must be cleaning
we must be cleaning
you must be cleaning
they must be cleaning	I must have cleaned
you must have cleaned
she must have cleaned
we must have cleaned
you must have cleaned
they must have cleaned	I must have been cleaning
you must have been cleaning
she must have been cleaning
we must have been cleaning
you must have been cleaning
they must have been cleaning	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not clean
you must not clean
she must not clean
we must not clean
you must not clean
they must not clean 	I must not be cleaning
you must not be cleaning
she must not be cleaning
we must not be cleaning
you must not be cleaning
they must not be cleaning	I must not have cleaned
you must not have cleaned
she must not have cleaned
we must not have cleaned
you must not have cleaned
they must not have cleaned	I must not have been cleaning
you must not have been cleaning
she must not have been cleaning
we must not have been cleaning
you must not have been cleaning
they must not have been cleaning	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I clean?
must you clean?
must she clean?
must we clean?
must you clean?
must they clean? 	must I be cleaning?
must you be cleaning?
must she be cleaning?
must we be cleaning?
must you be cleaning?
must they be cleaning? 	must I have cleaned?
must you have cleaned?
must she have cleaned?
must we have cleaned?
must you have cleaned?
must they have cleaned? 	must I have been cleaning?
must you have been cleaning?
must she have been cleaning?
must we have been cleaning?
must you have been cleaning?
must they have been cleaning? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not clean?
must you not clean?
must she not clean?
must we not clean?
must you not clean?
must they not clean? 	must I not be cleaning?
must you not be cleaning?
must she not be cleaning?
must we not be cleaning?
must you not be cleaning?
must they not be cleaning? 	must I not have cleaned?
must you not have cleaned?
must she not have cleaned?
must we not have cleaned?
must you not have cleaned?
must they not have cleaned? 	must I not have been cleaning?
must you not have been cleaning?
must she not have been cleaning?
must we not have been cleaning?
must you not have been cleaning?
must they not have been cleaning?