could oust
Regular verb: oust - ousted- ousted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could oust
you could oust
she could oust
we could oust
you could oust
they could oust 	I could be ousting
you could be ousting
she could be ousting
we could be ousting
you could be ousting
they could be ousting	I could have ousted
you could have ousted
she could have ousted
we could have ousted
you could have ousted
they could have ousted	I could have been ousting
you could have been ousting
she could have been ousting
we could have been ousting
you could have been ousting
they could have been ousting	

Negation 	
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I couldn't oust
you couldn't oust
she couldn't oust
we couldn't oust
you couldn't oust
they couldn't oust 	I couldn't be ousting
you couldn't be ousting
she couldn't be ousting
we couldn't be ousting
you couldn't be ousting
they couldn't be ousting	I couldn't have ousted
you couldn't have ousted
she couldn't have ousted
we couldn't have ousted
you couldn't have ousted
they couldn't have ousted	I couldn't have been ousting
you couldn't have been ousting
she couldn't have been ousting
we couldn't have been ousting
you couldn't have been ousting
they couldn't have been ousting	

Interrogative form 	
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could I oust?
could you oust?
could she oust?
could we oust?
could you oust?
could they oust? 	could I be ousting?
could you be ousting?
could she be ousting?
could we be ousting?
could you be ousting?
could they be ousting? 	could I have ousted?
could you have ousted?
could she have ousted?
could we have ousted?
could you have ousted?
could they have ousted? 	could I have been ousting?
could you have been ousting?
could she have been ousting?
could we have been ousting?
could you have been ousting?
could they have been ousting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I oust?
couldn't you oust?
couldn't she oust?
couldn't we oust?
couldn't you oust?
couldn't they oust? 	couldn't I be ousting?
couldn't you be ousting?
couldn't she be ousting?
couldn't we be ousting?
couldn't you be ousting?
couldn't they be ousting? 	couldn't I have ousted?
couldn't you have ousted?
couldn't she have ousted?
couldn't we have ousted?
couldn't you have ousted?
couldn't they have ousted? 	couldn't I have been ousting?
couldn't you have been ousting?
couldn't she have been ousting?
couldn't we have been ousting?
couldn't you have been ousting?
couldn't they have been ousting?