could migrate
Verbo regular: migrate - migrated- migrated

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could migrate
you could migrate
he could migrate
we could migrate
you could migrate
they could migrate 	I could be migrating
you could be migrating
he could be migrating
we could be migrating
you could be migrating
they could be migrating	I could have migrated
you could have migrated
he could have migrated
we could have migrated
you could have migrated
they could have migrated	I could have been migrating
you could have been migrating
he could have been migrating
we could have been migrating
you could have been migrating
they could have been migrating	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't migrate
you couldn't migrate
he couldn't migrate
we couldn't migrate
you couldn't migrate
they couldn't migrate 	I couldn't be migrating
you couldn't be migrating
he couldn't be migrating
we couldn't be migrating
you couldn't be migrating
they couldn't be migrating	I couldn't have migrated
you couldn't have migrated
he couldn't have migrated
we couldn't have migrated
you couldn't have migrated
they couldn't have migrated	I couldn't have been migrating
you couldn't have been migrating
he couldn't have been migrating
we couldn't have been migrating
you couldn't have been migrating
they couldn't have been migrating	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I migrate?
could you migrate?
could he migrate?
could we migrate?
could you migrate?
could they migrate? 	could I be migrating?
could you be migrating?
could he be migrating?
could we be migrating?
could you be migrating?
could they be migrating? 	could I have migrated?
could you have migrated?
could he have migrated?
could we have migrated?
could you have migrated?
could they have migrated? 	could I have been migrating?
could you have been migrating?
could he have been migrating?
could we have been migrating?
could you have been migrating?
could they have been migrating? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I migrate?
couldn't you migrate?
couldn't he migrate?
couldn't we migrate?
couldn't you migrate?
couldn't they migrate? 	couldn't I be migrating?
couldn't you be migrating?
couldn't he be migrating?
couldn't we be migrating?
couldn't you be migrating?
couldn't they be migrating? 	couldn't I have migrated?
couldn't you have migrated?
couldn't he have migrated?
couldn't we have migrated?
couldn't you have migrated?
couldn't they have migrated? 	couldn't I have been migrating?
couldn't you have been migrating?
couldn't he have been migrating?
couldn't we have been migrating?
couldn't you have been migrating?
couldn't they have been migrating?