could advert
Regular verb: advert - adverted- adverted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could advert
you could advert
he could advert
we could advert
you could advert
they could advert 	I could be adverting
you could be adverting
he could be adverting
we could be adverting
you could be adverting
they could be adverting	I could have adverted
you could have adverted
he could have adverted
we could have adverted
you could have adverted
they could have adverted	I could have been adverting
you could have been adverting
he could have been adverting
we could have been adverting
you could have been adverting
they could have been adverting	

Negation 	
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I couldn't advert
you couldn't advert
he couldn't advert
we couldn't advert
you couldn't advert
they couldn't advert 	I couldn't be adverting
you couldn't be adverting
he couldn't be adverting
we couldn't be adverting
you couldn't be adverting
they couldn't be adverting	I couldn't have adverted
you couldn't have adverted
he couldn't have adverted
we couldn't have adverted
you couldn't have adverted
they couldn't have adverted	I couldn't have been adverting
you couldn't have been adverting
he couldn't have been adverting
we couldn't have been adverting
you couldn't have been adverting
they couldn't have been adverting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I advert?
could you advert?
could he advert?
could we advert?
could you advert?
could they advert? 	could I be adverting?
could you be adverting?
could he be adverting?
could we be adverting?
could you be adverting?
could they be adverting? 	could I have adverted?
could you have adverted?
could he have adverted?
could we have adverted?
could you have adverted?
could they have adverted? 	could I have been adverting?
could you have been adverting?
could he have been adverting?
could we have been adverting?
could you have been adverting?
could they have been adverting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I advert?
couldn't you advert?
couldn't he advert?
couldn't we advert?
couldn't you advert?
couldn't they advert? 	couldn't I be adverting?
couldn't you be adverting?
couldn't he be adverting?
couldn't we be adverting?
couldn't you be adverting?
couldn't they be adverting? 	couldn't I have adverted?
couldn't you have adverted?
couldn't he have adverted?
couldn't we have adverted?
couldn't you have adverted?
couldn't they have adverted? 	couldn't I have been adverting?
couldn't you have been adverting?
couldn't he have been adverting?
couldn't we have been adverting?
couldn't you have been adverting?
couldn't they have been adverting?