could devaluate
Regular verb: devaluate - devaluated- devaluated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could devaluate
you could devaluate
she could devaluate
we could devaluate
you could devaluate
they could devaluate 	I could be devaluating
you could be devaluating
she could be devaluating
we could be devaluating
you could be devaluating
they could be devaluating	I could have devaluated
you could have devaluated
she could have devaluated
we could have devaluated
you could have devaluated
they could have devaluated	I could have been devaluating
you could have been devaluating
she could have been devaluating
we could have been devaluating
you could have been devaluating
they could have been devaluating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't devaluate
you couldn't devaluate
she couldn't devaluate
we couldn't devaluate
you couldn't devaluate
they couldn't devaluate 	I couldn't be devaluating
you couldn't be devaluating
she couldn't be devaluating
we couldn't be devaluating
you couldn't be devaluating
they couldn't be devaluating	I couldn't have devaluated
you couldn't have devaluated
she couldn't have devaluated
we couldn't have devaluated
you couldn't have devaluated
they couldn't have devaluated	I couldn't have been devaluating
you couldn't have been devaluating
she couldn't have been devaluating
we couldn't have been devaluating
you couldn't have been devaluating
they couldn't have been devaluating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I devaluate?
could you devaluate?
could she devaluate?
could we devaluate?
could you devaluate?
could they devaluate? 	could I be devaluating?
could you be devaluating?
could she be devaluating?
could we be devaluating?
could you be devaluating?
could they be devaluating? 	could I have devaluated?
could you have devaluated?
could she have devaluated?
could we have devaluated?
could you have devaluated?
could they have devaluated? 	could I have been devaluating?
could you have been devaluating?
could she have been devaluating?
could we have been devaluating?
could you have been devaluating?
could they have been devaluating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I devaluate?
couldn't you devaluate?
couldn't she devaluate?
couldn't we devaluate?
couldn't you devaluate?
couldn't they devaluate? 	couldn't I be devaluating?
couldn't you be devaluating?
couldn't she be devaluating?
couldn't we be devaluating?
couldn't you be devaluating?
couldn't they be devaluating? 	couldn't I have devaluated?
couldn't you have devaluated?
couldn't she have devaluated?
couldn't we have devaluated?
couldn't you have devaluated?
couldn't they have devaluated? 	couldn't I have been devaluating?
couldn't you have been devaluating?
couldn't she have been devaluating?
couldn't we have been devaluating?
couldn't you have been devaluating?
couldn't they have been devaluating?