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