could overcontribute
Regular verb: overcontribute - overcontributed- overcontributed

Affirmation 	
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I could overcontribute
you could overcontribute
she could overcontribute
we could overcontribute
you could overcontribute
they could overcontribute 	I could be overcontributing
you could be overcontributing
she could be overcontributing
we could be overcontributing
you could be overcontributing
they could be overcontributing	I could have overcontributed
you could have overcontributed
she could have overcontributed
we could have overcontributed
you could have overcontributed
they could have overcontributed	I could have been overcontributing
you could have been overcontributing
she could have been overcontributing
we could have been overcontributing
you could have been overcontributing
they could have been overcontributing	

Negation 	
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I couldn't overcontribute
you couldn't overcontribute
she couldn't overcontribute
we couldn't overcontribute
you couldn't overcontribute
they couldn't overcontribute 	I couldn't be overcontributing
you couldn't be overcontributing
she couldn't be overcontributing
we couldn't be overcontributing
you couldn't be overcontributing
they couldn't be overcontributing	I couldn't have overcontributed
you couldn't have overcontributed
she couldn't have overcontributed
we couldn't have overcontributed
you couldn't have overcontributed
they couldn't have overcontributed	I couldn't have been overcontributing
you couldn't have been overcontributing
she couldn't have been overcontributing
we couldn't have been overcontributing
you couldn't have been overcontributing
they couldn't have been overcontributing	

Interrogative form 	
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could I overcontribute?
could you overcontribute?
could she overcontribute?
could we overcontribute?
could you overcontribute?
could they overcontribute? 	could I be overcontributing?
could you be overcontributing?
could she be overcontributing?
could we be overcontributing?
could you be overcontributing?
could they be overcontributing? 	could I have overcontributed?
could you have overcontributed?
could she have overcontributed?
could we have overcontributed?
could you have overcontributed?
could they have overcontributed? 	could I have been overcontributing?
could you have been overcontributing?
could she have been overcontributing?
could we have been overcontributing?
could you have been overcontributing?
could they have been overcontributing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I overcontribute?
couldn't you overcontribute?
couldn't she overcontribute?
couldn't we overcontribute?
couldn't you overcontribute?
couldn't they overcontribute? 	couldn't I be overcontributing?
couldn't you be overcontributing?
couldn't she be overcontributing?
couldn't we be overcontributing?
couldn't you be overcontributing?
couldn't they be overcontributing? 	couldn't I have overcontributed?
couldn't you have overcontributed?
couldn't she have overcontributed?
couldn't we have overcontributed?
couldn't you have overcontributed?
couldn't they have overcontributed? 	couldn't I have been overcontributing?
couldn't you have been overcontributing?
couldn't she have been overcontributing?
couldn't we have been overcontributing?
couldn't you have been overcontributing?
couldn't they have been overcontributing?