could unearth
Regular verb: unearth - unearthed- unearthed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could unearth
you could unearth
he could unearth
we could unearth
you could unearth
they could unearth 	I could be unearthing
you could be unearthing
he could be unearthing
we could be unearthing
you could be unearthing
they could be unearthing	I could have unearthed
you could have unearthed
he could have unearthed
we could have unearthed
you could have unearthed
they could have unearthed	I could have been unearthing
you could have been unearthing
he could have been unearthing
we could have been unearthing
you could have been unearthing
they could have been unearthing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't unearth
you couldn't unearth
he couldn't unearth
we couldn't unearth
you couldn't unearth
they couldn't unearth 	I couldn't be unearthing
you couldn't be unearthing
he couldn't be unearthing
we couldn't be unearthing
you couldn't be unearthing
they couldn't be unearthing	I couldn't have unearthed
you couldn't have unearthed
he couldn't have unearthed
we couldn't have unearthed
you couldn't have unearthed
they couldn't have unearthed	I couldn't have been unearthing
you couldn't have been unearthing
he couldn't have been unearthing
we couldn't have been unearthing
you couldn't have been unearthing
they couldn't have been unearthing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I unearth?
could you unearth?
could he unearth?
could we unearth?
could you unearth?
could they unearth? 	could I be unearthing?
could you be unearthing?
could he be unearthing?
could we be unearthing?
could you be unearthing?
could they be unearthing? 	could I have unearthed?
could you have unearthed?
could he have unearthed?
could we have unearthed?
could you have unearthed?
could they have unearthed? 	could I have been unearthing?
could you have been unearthing?
could he have been unearthing?
could we have been unearthing?
could you have been unearthing?
could they have been unearthing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I unearth?
couldn't you unearth?
couldn't he unearth?
couldn't we unearth?
couldn't you unearth?
couldn't they unearth? 	couldn't I be unearthing?
couldn't you be unearthing?
couldn't he be unearthing?
couldn't we be unearthing?
couldn't you be unearthing?
couldn't they be unearthing? 	couldn't I have unearthed?
couldn't you have unearthed?
couldn't he have unearthed?
couldn't we have unearthed?
couldn't you have unearthed?
couldn't they have unearthed? 	couldn't I have been unearthing?
couldn't you have been unearthing?
couldn't he have been unearthing?
couldn't we have been unearthing?
couldn't you have been unearthing?
couldn't they have been unearthing?