could marginate
Regular verb: marginate - marginated- marginated

Affirmation 	
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I could marginate
you could marginate
he could marginate
we could marginate
you could marginate
they could marginate 	I could be marginating
you could be marginating
he could be marginating
we could be marginating
you could be marginating
they could be marginating	I could have marginated
you could have marginated
he could have marginated
we could have marginated
you could have marginated
they could have marginated	I could have been marginating
you could have been marginating
he could have been marginating
we could have been marginating
you could have been marginating
they could have been marginating	

Negation 	
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I couldn't marginate
you couldn't marginate
he couldn't marginate
we couldn't marginate
you couldn't marginate
they couldn't marginate 	I couldn't be marginating
you couldn't be marginating
he couldn't be marginating
we couldn't be marginating
you couldn't be marginating
they couldn't be marginating	I couldn't have marginated
you couldn't have marginated
he couldn't have marginated
we couldn't have marginated
you couldn't have marginated
they couldn't have marginated	I couldn't have been marginating
you couldn't have been marginating
he couldn't have been marginating
we couldn't have been marginating
you couldn't have been marginating
they couldn't have been marginating	

Interrogative form 	
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could I marginate?
could you marginate?
could he marginate?
could we marginate?
could you marginate?
could they marginate? 	could I be marginating?
could you be marginating?
could he be marginating?
could we be marginating?
could you be marginating?
could they be marginating? 	could I have marginated?
could you have marginated?
could he have marginated?
could we have marginated?
could you have marginated?
could they have marginated? 	could I have been marginating?
could you have been marginating?
could he have been marginating?
could we have been marginating?
could you have been marginating?
could they have been marginating? 	

Interro-negative form 	
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couldn't I marginate?
couldn't you marginate?
couldn't he marginate?
couldn't we marginate?
couldn't you marginate?
couldn't they marginate? 	couldn't I be marginating?
couldn't you be marginating?
couldn't he be marginating?
couldn't we be marginating?
couldn't you be marginating?
couldn't they be marginating? 	couldn't I have marginated?
couldn't you have marginated?
couldn't he have marginated?
couldn't we have marginated?
couldn't you have marginated?
couldn't they have marginated? 	couldn't I have been marginating?
couldn't you have been marginating?
couldn't he have been marginating?
couldn't we have been marginating?
couldn't you have been marginating?
couldn't they have been marginating?