could proofread
Verbo irregular: proofread - proofread- proofread

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

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

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

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