could consternate
Regular verb: consternate - consternated- consternated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could consternate
you could consternate
she could consternate
we could consternate
you could consternate
they could consternate 	I could be consternating
you could be consternating
she could be consternating
we could be consternating
you could be consternating
they could be consternating	I could have consternated
you could have consternated
she could have consternated
we could have consternated
you could have consternated
they could have consternated	I could have been consternating
you could have been consternating
she could have been consternating
we could have been consternating
you could have been consternating
they could have been consternating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't consternate
you couldn't consternate
she couldn't consternate
we couldn't consternate
you couldn't consternate
they couldn't consternate 	I couldn't be consternating
you couldn't be consternating
she couldn't be consternating
we couldn't be consternating
you couldn't be consternating
they couldn't be consternating	I couldn't have consternated
you couldn't have consternated
she couldn't have consternated
we couldn't have consternated
you couldn't have consternated
they couldn't have consternated	I couldn't have been consternating
you couldn't have been consternating
she couldn't have been consternating
we couldn't have been consternating
you couldn't have been consternating
they couldn't have been consternating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I consternate?
could you consternate?
could she consternate?
could we consternate?
could you consternate?
could they consternate? 	could I be consternating?
could you be consternating?
could she be consternating?
could we be consternating?
could you be consternating?
could they be consternating? 	could I have consternated?
could you have consternated?
could she have consternated?
could we have consternated?
could you have consternated?
could they have consternated? 	could I have been consternating?
could you have been consternating?
could she have been consternating?
could we have been consternating?
could you have been consternating?
could they have been consternating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I consternate?
couldn't you consternate?
couldn't she consternate?
couldn't we consternate?
couldn't you consternate?
couldn't they consternate? 	couldn't I be consternating?
couldn't you be consternating?
couldn't she be consternating?
couldn't we be consternating?
couldn't you be consternating?
couldn't they be consternating? 	couldn't I have consternated?
couldn't you have consternated?
couldn't she have consternated?
couldn't we have consternated?
couldn't you have consternated?
couldn't they have consternated? 	couldn't I have been consternating?
couldn't you have been consternating?
couldn't she have been consternating?
couldn't we have been consternating?
couldn't you have been consternating?
couldn't they have been consternating?