must proofread
Verbo irregular: proofread - proofread- proofread

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must proofread
you must proofread
he must proofread
we must proofread
you must proofread
they must proofread 	I must be proofreading
you must be proofreading
he must be proofreading
we must be proofreading
you must be proofreading
they must be proofreading	I must have proofread
you must have proofread
he must have proofread
we must have proofread
you must have proofread
they must have proofread	I must have been proofreading
you must have been proofreading
he must have been proofreading
we must have been proofreading
you must have been proofreading
they must have been proofreading	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't proofread
you mustn't proofread
he mustn't proofread
we mustn't proofread
you mustn't proofread
they mustn't proofread 	I mustn't be proofreading
you mustn't be proofreading
he mustn't be proofreading
we mustn't be proofreading
you mustn't be proofreading
they mustn't be proofreading	I mustn't have proofread
you mustn't have proofread
he mustn't have proofread
we mustn't have proofread
you mustn't have proofread
they mustn't have proofread	I mustn't have been proofreading
you mustn't have been proofreading
he mustn't have been proofreading
we mustn't have been proofreading
you mustn't have been proofreading
they mustn't have been proofreading	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I proofread?
must you proofread?
must he proofread?
must we proofread?
must you proofread?
must they proofread? 	must I be proofreading?
must you be proofreading?
must he be proofreading?
must we be proofreading?
must you be proofreading?
must they be proofreading? 	must I have proofread?
must you have proofread?
must he have proofread?
must we have proofread?
must you have proofread?
must they have proofread? 	must I have been proofreading?
must you have been proofreading?
must he have been proofreading?
must we have been proofreading?
must you have been proofreading?
must they have been proofreading? 	

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