could banish banish
Regular verb: banish banish - banish banished- banish banished

, this verb may not exist. Conjugation is given as example.

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could banish banish
you could banish banish
she could banish banish
we could banish banish
you could banish banish
they could banish banish 	I could be banish banishing
you could be banish banishing
she could be banish banishing
we could be banish banishing
you could be banish banishing
they could be banish banishing	I could have banish banished
you could have banish banished
she could have banish banished
we could have banish banished
you could have banish banished
they could have banish banished	I could have been banish banishing
you could have been banish banishing
she could have been banish banishing
we could have been banish banishing
you could have been banish banishing
they could have been banish banishing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't banish banish
you couldn't banish banish
she couldn't banish banish
we couldn't banish banish
you couldn't banish banish
they couldn't banish banish 	I couldn't be banish banishing
you couldn't be banish banishing
she couldn't be banish banishing
we couldn't be banish banishing
you couldn't be banish banishing
they couldn't be banish banishing	I couldn't have banish banished
you couldn't have banish banished
she couldn't have banish banished
we couldn't have banish banished
you couldn't have banish banished
they couldn't have banish banished	I couldn't have been banish banishing
you couldn't have been banish banishing
she couldn't have been banish banishing
we couldn't have been banish banishing
you couldn't have been banish banishing
they couldn't have been banish banishing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I banish banish?
could you banish banish?
could she banish banish?
could we banish banish?
could you banish banish?
could they banish banish? 	could I be banish banishing?
could you be banish banishing?
could she be banish banishing?
could we be banish banishing?
could you be banish banishing?
could they be banish banishing? 	could I have banish banished?
could you have banish banished?
could she have banish banished?
could we have banish banished?
could you have banish banished?
could they have banish banished? 	could I have been banish banishing?
could you have been banish banishing?
could she have been banish banishing?
could we have been banish banishing?
could you have been banish banishing?
could they have been banish banishing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I banish banish?
couldn't you banish banish?
couldn't she banish banish?
couldn't we banish banish?
couldn't you banish banish?
couldn't they banish banish? 	couldn't I be banish banishing?
couldn't you be banish banishing?
couldn't she be banish banishing?
couldn't we be banish banishing?
couldn't you be banish banishing?
couldn't they be banish banishing? 	couldn't I have banish banished?
couldn't you have banish banished?
couldn't she have banish banished?
couldn't we have banish banished?
couldn't you have banish banished?
couldn't they have banish banished? 	couldn't I have been banish banishing?
couldn't you have been banish banishing?
couldn't she have been banish banishing?
couldn't we have been banish banishing?
couldn't you have been banish banishing?
couldn't they have been banish banishing?