could preadvertise
Regular verb: preadvertise - preadvertised- preadvertised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could preadvertise
you could preadvertise
she could preadvertise
we could preadvertise
you could preadvertise
they could preadvertise 	I could be preadvertising
you could be preadvertising
she could be preadvertising
we could be preadvertising
you could be preadvertising
they could be preadvertising	I could have preadvertised
you could have preadvertised
she could have preadvertised
we could have preadvertised
you could have preadvertised
they could have preadvertised	I could have been preadvertising
you could have been preadvertising
she could have been preadvertising
we could have been preadvertising
you could have been preadvertising
they could have been preadvertising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't preadvertise
you couldn't preadvertise
she couldn't preadvertise
we couldn't preadvertise
you couldn't preadvertise
they couldn't preadvertise 	I couldn't be preadvertising
you couldn't be preadvertising
she couldn't be preadvertising
we couldn't be preadvertising
you couldn't be preadvertising
they couldn't be preadvertising	I couldn't have preadvertised
you couldn't have preadvertised
she couldn't have preadvertised
we couldn't have preadvertised
you couldn't have preadvertised
they couldn't have preadvertised	I couldn't have been preadvertising
you couldn't have been preadvertising
she couldn't have been preadvertising
we couldn't have been preadvertising
you couldn't have been preadvertising
they couldn't have been preadvertising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I preadvertise?
could you preadvertise?
could she preadvertise?
could we preadvertise?
could you preadvertise?
could they preadvertise? 	could I be preadvertising?
could you be preadvertising?
could she be preadvertising?
could we be preadvertising?
could you be preadvertising?
could they be preadvertising? 	could I have preadvertised?
could you have preadvertised?
could she have preadvertised?
could we have preadvertised?
could you have preadvertised?
could they have preadvertised? 	could I have been preadvertising?
could you have been preadvertising?
could she have been preadvertising?
could we have been preadvertising?
could you have been preadvertising?
could they have been preadvertising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I preadvertise?
couldn't you preadvertise?
couldn't she preadvertise?
couldn't we preadvertise?
couldn't you preadvertise?
couldn't they preadvertise? 	couldn't I be preadvertising?
couldn't you be preadvertising?
couldn't she be preadvertising?
couldn't we be preadvertising?
couldn't you be preadvertising?
couldn't they be preadvertising? 	couldn't I have preadvertised?
couldn't you have preadvertised?
couldn't she have preadvertised?
couldn't we have preadvertised?
couldn't you have preadvertised?
couldn't they have preadvertised? 	couldn't I have been preadvertising?
couldn't you have been preadvertising?
couldn't she have been preadvertising?
couldn't we have been preadvertising?
couldn't you have been preadvertising?
couldn't they have been preadvertising?