must express
Verbo regular: express - expressed- expressed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must express
you must express
he must express
we must express
you must express
they must express 	I must be expressing
you must be expressing
he must be expressing
we must be expressing
you must be expressing
they must be expressing	I must have expressed
you must have expressed
he must have expressed
we must have expressed
you must have expressed
they must have expressed	I must have been expressing
you must have been expressing
he must have been expressing
we must have been expressing
you must have been expressing
they must have been expressing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't express
you mustn't express
he mustn't express
we mustn't express
you mustn't express
they mustn't express 	I mustn't be expressing
you mustn't be expressing
he mustn't be expressing
we mustn't be expressing
you mustn't be expressing
they mustn't be expressing	I mustn't have expressed
you mustn't have expressed
he mustn't have expressed
we mustn't have expressed
you mustn't have expressed
they mustn't have expressed	I mustn't have been expressing
you mustn't have been expressing
he mustn't have been expressing
we mustn't have been expressing
you mustn't have been expressing
they mustn't have been expressing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I express?
must you express?
must he express?
must we express?
must you express?
must they express? 	must I be expressing?
must you be expressing?
must he be expressing?
must we be expressing?
must you be expressing?
must they be expressing? 	must I have expressed?
must you have expressed?
must he have expressed?
must we have expressed?
must you have expressed?
must they have expressed? 	must I have been expressing?
must you have been expressing?
must he have been expressing?
must we have been expressing?
must you have been expressing?
must they have been expressing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I express?
mustn't you express?
mustn't he express?
mustn't we express?
mustn't you express?
mustn't they express? 	mustn't I be expressing?
mustn't you be expressing?
mustn't he be expressing?
mustn't we be expressing?
mustn't you be expressing?
mustn't they be expressing? 	mustn't I have expressed?
mustn't you have expressed?
mustn't he have expressed?
mustn't we have expressed?
mustn't you have expressed?
mustn't they have expressed? 	mustn't I have been expressing?
mustn't you have been expressing?
mustn't he have been expressing?
mustn't we have been expressing?
mustn't you have been expressing?
mustn't they have been expressing?