could asseverate
Regular verb: asseverate - asseverated- asseverated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could asseverate
you could asseverate
she could asseverate
we could asseverate
you could asseverate
they could asseverate 	I could be asseverating
you could be asseverating
she could be asseverating
we could be asseverating
you could be asseverating
they could be asseverating	I could have asseverated
you could have asseverated
she could have asseverated
we could have asseverated
you could have asseverated
they could have asseverated	I could have been asseverating
you could have been asseverating
she could have been asseverating
we could have been asseverating
you could have been asseverating
they could have been asseverating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't asseverate
you couldn't asseverate
she couldn't asseverate
we couldn't asseverate
you couldn't asseverate
they couldn't asseverate 	I couldn't be asseverating
you couldn't be asseverating
she couldn't be asseverating
we couldn't be asseverating
you couldn't be asseverating
they couldn't be asseverating	I couldn't have asseverated
you couldn't have asseverated
she couldn't have asseverated
we couldn't have asseverated
you couldn't have asseverated
they couldn't have asseverated	I couldn't have been asseverating
you couldn't have been asseverating
she couldn't have been asseverating
we couldn't have been asseverating
you couldn't have been asseverating
they couldn't have been asseverating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I asseverate?
could you asseverate?
could she asseverate?
could we asseverate?
could you asseverate?
could they asseverate? 	could I be asseverating?
could you be asseverating?
could she be asseverating?
could we be asseverating?
could you be asseverating?
could they be asseverating? 	could I have asseverated?
could you have asseverated?
could she have asseverated?
could we have asseverated?
could you have asseverated?
could they have asseverated? 	could I have been asseverating?
could you have been asseverating?
could she have been asseverating?
could we have been asseverating?
could you have been asseverating?
could they have been asseverating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I asseverate?
couldn't you asseverate?
couldn't she asseverate?
couldn't we asseverate?
couldn't you asseverate?
couldn't they asseverate? 	couldn't I be asseverating?
couldn't you be asseverating?
couldn't she be asseverating?
couldn't we be asseverating?
couldn't you be asseverating?
couldn't they be asseverating? 	couldn't I have asseverated?
couldn't you have asseverated?
couldn't she have asseverated?
couldn't we have asseverated?
couldn't you have asseverated?
couldn't they have asseverated? 	couldn't I have been asseverating?
couldn't you have been asseverating?
couldn't she have been asseverating?
couldn't we have been asseverating?
couldn't you have been asseverating?
couldn't they have been asseverating?