could banish
Regular verb: banish - banished- banished

Affirmation 	
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I could banish
you could banish
she could banish
we could banish
you could banish
they could banish 	I could be banishing
you could be banishing
she could be banishing
we could be banishing
you could be banishing
they could be banishing	I could have banished
you could have banished
she could have banished
we could have banished
you could have banished
they could have banished	I could have been banishing
you could have been banishing
she could have been banishing
we could have been banishing
you could have been banishing
they could have been banishing	

Negation 	
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I couldn't banish
you couldn't banish
she couldn't banish
we couldn't banish
you couldn't banish
they couldn't banish 	I couldn't be banishing
you couldn't be banishing
she couldn't be banishing
we couldn't be banishing
you couldn't be banishing
they couldn't be banishing	I couldn't have banished
you couldn't have banished
she couldn't have banished
we couldn't have banished
you couldn't have banished
they couldn't have banished	I couldn't have been banishing
you couldn't have been banishing
she couldn't have been banishing
we couldn't have been banishing
you couldn't have been banishing
they couldn't have been banishing	

Interrogative form 	
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could I banish?
could you banish?
could she banish?
could we banish?
could you banish?
could they banish? 	could I be banishing?
could you be banishing?
could she be banishing?
could we be banishing?
could you be banishing?
could they be banishing? 	could I have banished?
could you have banished?
could she have banished?
could we have banished?
could you have banished?
could they have banished? 	could I have been banishing?
could you have been banishing?
could she have been banishing?
could we have been banishing?
could you have been banishing?
could they have been banishing? 	

Interro-negative form 	
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couldn't I banish?
couldn't you banish?
couldn't she banish?
couldn't we banish?
couldn't you banish?
couldn't they banish? 	couldn't I be banishing?
couldn't you be banishing?
couldn't she be banishing?
couldn't we be banishing?
couldn't you be banishing?
couldn't they be banishing? 	couldn't I have banished?
couldn't you have banished?
couldn't she have banished?
couldn't we have banished?
couldn't you have banished?
couldn't they have banished? 	couldn't I have been banishing?
couldn't you have been banishing?
couldn't she have been banishing?
couldn't we have been banishing?
couldn't you have been banishing?
couldn't they have been banishing?