English verb conjugation
COULD AVIATE

Regular verb: aviate - aviated - aviated

Affirmation

Simple form	V-ing form
I could aviate you could aviate he could aviate we could aviate you could aviate they could aviate	I could be aviating you could be aviating he could be aviating we could be aviating you could be aviating they could be aviating
Perfect	V-ing perfect
I could have aviated you could have aviated he could have aviated we could have aviated you could have aviated they could have aviated	I could have been aviating you could have been aviating he could have been aviating we could have been aviating you could have been aviating they could have been aviating

Negation

Simple form	V-ing form
I couldn't aviate you couldn't aviate he couldn't aviate we couldn't aviate you couldn't aviate they couldn't aviate	I couldn't be aviating you couldn't be aviating he couldn't be aviating we couldn't be aviating you couldn't be aviating they couldn't be aviating
Perfect	V-ing perfect
I couldn't have aviated you couldn't have aviated he couldn't have aviated we couldn't have aviated you couldn't have aviated they couldn't have aviated	I couldn't have been aviating you couldn't have been aviating he couldn't have been aviating we couldn't have been aviating you couldn't have been aviating they couldn't have been aviating

Interrogative form

Simple form	V-ing form
could I aviate? could you aviate? could he aviate? could we aviate? could you aviate? could they aviate?	could I be aviating? could you be aviating? could he be aviating? could we be aviating? could you be aviating? could they be aviating?
Perfect	V-ing perfect
could I have aviated? could you have aviated? could he have aviated? could we have aviated? could you have aviated? could they have aviated?	could I have been aviating? could you have been aviating? could he have been aviating? could we have been aviating? could you have been aviating? could they have been aviating?

Interro-negative form

Simple form	V-ing form
couldn't I aviate? couldn't you aviate? couldn't he aviate? couldn't we aviate? couldn't you aviate? couldn't they aviate?	couldn't I be aviating? couldn't you be aviating? couldn't he be aviating? couldn't we be aviating? couldn't you be aviating? couldn't they be aviating?
Perfect	V-ing perfect
couldn't I have aviated? couldn't you have aviated? couldn't he have aviated? couldn't we have aviated? couldn't you have aviated? couldn't they have aviated?	couldn't I have been aviating? couldn't you have been aviating? couldn't he have been aviating? couldn't we have been aviating? couldn't you have been aviating? couldn't they have been aviating?