could deviate
Regular verb: deviate - deviated- deviated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could deviate
you could deviate
she could deviate
we could deviate
you could deviate
they could deviate 	I could be deviating
you could be deviating
she could be deviating
we could be deviating
you could be deviating
they could be deviating	I could have deviated
you could have deviated
she could have deviated
we could have deviated
you could have deviated
they could have deviated	I could have been deviating
you could have been deviating
she could have been deviating
we could have been deviating
you could have been deviating
they could have been deviating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't deviate
you couldn't deviate
she couldn't deviate
we couldn't deviate
you couldn't deviate
they couldn't deviate 	I couldn't be deviating
you couldn't be deviating
she couldn't be deviating
we couldn't be deviating
you couldn't be deviating
they couldn't be deviating	I couldn't have deviated
you couldn't have deviated
she couldn't have deviated
we couldn't have deviated
you couldn't have deviated
they couldn't have deviated	I couldn't have been deviating
you couldn't have been deviating
she couldn't have been deviating
we couldn't have been deviating
you couldn't have been deviating
they couldn't have been deviating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I deviate?
could you deviate?
could she deviate?
could we deviate?
could you deviate?
could they deviate? 	could I be deviating?
could you be deviating?
could she be deviating?
could we be deviating?
could you be deviating?
could they be deviating? 	could I have deviated?
could you have deviated?
could she have deviated?
could we have deviated?
could you have deviated?
could they have deviated? 	could I have been deviating?
could you have been deviating?
could she have been deviating?
could we have been deviating?
could you have been deviating?
could they have been deviating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I deviate?
couldn't you deviate?
couldn't she deviate?
couldn't we deviate?
couldn't you deviate?
couldn't they deviate? 	couldn't I be deviating?
couldn't you be deviating?
couldn't she be deviating?
couldn't we be deviating?
couldn't you be deviating?
couldn't they be deviating? 	couldn't I have deviated?
couldn't you have deviated?
couldn't she have deviated?
couldn't we have deviated?
couldn't you have deviated?
couldn't they have deviated? 	couldn't I have been deviating?
couldn't you have been deviating?
couldn't she have been deviating?
couldn't we have been deviating?
couldn't you have been deviating?
couldn't they have been deviating?