could contradistinguish
Regular verb: contradistinguish - contradistinguished- contradistinguished

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could contradistinguish
you could contradistinguish
he could contradistinguish
we could contradistinguish
you could contradistinguish
they could contradistinguish 	I could be contradistinguishing
you could be contradistinguishing
he could be contradistinguishing
we could be contradistinguishing
you could be contradistinguishing
they could be contradistinguishing	I could have contradistinguished
you could have contradistinguished
he could have contradistinguished
we could have contradistinguished
you could have contradistinguished
they could have contradistinguished	I could have been contradistinguishing
you could have been contradistinguishing
he could have been contradistinguishing
we could have been contradistinguishing
you could have been contradistinguishing
they could have been contradistinguishing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't contradistinguish
you couldn't contradistinguish
he couldn't contradistinguish
we couldn't contradistinguish
you couldn't contradistinguish
they couldn't contradistinguish 	I couldn't be contradistinguishing
you couldn't be contradistinguishing
he couldn't be contradistinguishing
we couldn't be contradistinguishing
you couldn't be contradistinguishing
they couldn't be contradistinguishing	I couldn't have contradistinguished
you couldn't have contradistinguished
he couldn't have contradistinguished
we couldn't have contradistinguished
you couldn't have contradistinguished
they couldn't have contradistinguished	I couldn't have been contradistinguishing
you couldn't have been contradistinguishing
he couldn't have been contradistinguishing
we couldn't have been contradistinguishing
you couldn't have been contradistinguishing
they couldn't have been contradistinguishing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I contradistinguish?
could you contradistinguish?
could he contradistinguish?
could we contradistinguish?
could you contradistinguish?
could they contradistinguish? 	could I be contradistinguishing?
could you be contradistinguishing?
could he be contradistinguishing?
could we be contradistinguishing?
could you be contradistinguishing?
could they be contradistinguishing? 	could I have contradistinguished?
could you have contradistinguished?
could he have contradistinguished?
could we have contradistinguished?
could you have contradistinguished?
could they have contradistinguished? 	could I have been contradistinguishing?
could you have been contradistinguishing?
could he have been contradistinguishing?
could we have been contradistinguishing?
could you have been contradistinguishing?
could they have been contradistinguishing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I contradistinguish?
couldn't you contradistinguish?
couldn't he contradistinguish?
couldn't we contradistinguish?
couldn't you contradistinguish?
couldn't they contradistinguish? 	couldn't I be contradistinguishing?
couldn't you be contradistinguishing?
couldn't he be contradistinguishing?
couldn't we be contradistinguishing?
couldn't you be contradistinguishing?
couldn't they be contradistinguishing? 	couldn't I have contradistinguished?
couldn't you have contradistinguished?
couldn't he have contradistinguished?
couldn't we have contradistinguished?
couldn't you have contradistinguished?
couldn't they have contradistinguished? 	couldn't I have been contradistinguishing?
couldn't you have been contradistinguishing?
couldn't he have been contradistinguishing?
couldn't we have been contradistinguishing?
couldn't you have been contradistinguishing?
couldn't they have been contradistinguishing?