must improve
Verbo regular: improve - improved- improved

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must improve
you must improve
she must improve
we must improve
you must improve
they must improve 	I must be improving
you must be improving
she must be improving
we must be improving
you must be improving
they must be improving	I must have improved
you must have improved
she must have improved
we must have improved
you must have improved
they must have improved	I must have been improving
you must have been improving
she must have been improving
we must have been improving
you must have been improving
they must have been improving	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not improve
you must not improve
she must not improve
we must not improve
you must not improve
they must not improve 	I must not be improving
you must not be improving
she must not be improving
we must not be improving
you must not be improving
they must not be improving	I must not have improved
you must not have improved
she must not have improved
we must not have improved
you must not have improved
they must not have improved	I must not have been improving
you must not have been improving
she must not have been improving
we must not have been improving
you must not have been improving
they must not have been improving	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I improve?
must you improve?
must she improve?
must we improve?
must you improve?
must they improve? 	must I be improving?
must you be improving?
must she be improving?
must we be improving?
must you be improving?
must they be improving? 	must I have improved?
must you have improved?
must she have improved?
must we have improved?
must you have improved?
must they have improved? 	must I have been improving?
must you have been improving?
must she have been improving?
must we have been improving?
must you have been improving?
must they have been improving? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not improve?
must you not improve?
must she not improve?
must we not improve?
must you not improve?
must they not improve? 	must I not be improving?
must you not be improving?
must she not be improving?
must we not be improving?
must you not be improving?
must they not be improving? 	must I not have improved?
must you not have improved?
must she not have improved?
must we not have improved?
must you not have improved?
must they not have improved? 	must I not have been improving?
must you not have been improving?
must she not have been improving?
must we not have been improving?
must you not have been improving?
must they not have been improving?