English verb conjugation
COULD SUPINATE

Regular verb: supinate - supinated - supinated

Affirmation

Simple form	V-ing form
I could supinate you could supinate he could supinate we could supinate you could supinate they could supinate	I could be supinating you could be supinating he could be supinating we could be supinating you could be supinating they could be supinating
Perfect	V-ing perfect
I could have supinated you could have supinated he could have supinated we could have supinated you could have supinated they could have supinated	I could have been supinating you could have been supinating he could have been supinating we could have been supinating you could have been supinating they could have been supinating

Negation

Simple form	V-ing form
I couldn't supinate you couldn't supinate he couldn't supinate we couldn't supinate you couldn't supinate they couldn't supinate	I couldn't be supinating you couldn't be supinating he couldn't be supinating we couldn't be supinating you couldn't be supinating they couldn't be supinating
Perfect	V-ing perfect
I couldn't have supinated you couldn't have supinated he couldn't have supinated we couldn't have supinated you couldn't have supinated they couldn't have supinated	I couldn't have been supinating you couldn't have been supinating he couldn't have been supinating we couldn't have been supinating you couldn't have been supinating they couldn't have been supinating

Interrogative form

Simple form	V-ing form
could I supinate? could you supinate? could he supinate? could we supinate? could you supinate? could they supinate?	could I be supinating? could you be supinating? could he be supinating? could we be supinating? could you be supinating? could they be supinating?
Perfect	V-ing perfect
could I have supinated? could you have supinated? could he have supinated? could we have supinated? could you have supinated? could they have supinated?	could I have been supinating? could you have been supinating? could he have been supinating? could we have been supinating? could you have been supinating? could they have been supinating?

Interro-negative form

Simple form	V-ing form
couldn't I supinate? couldn't you supinate? couldn't he supinate? couldn't we supinate? couldn't you supinate? couldn't they supinate?	couldn't I be supinating? couldn't you be supinating? couldn't he be supinating? couldn't we be supinating? couldn't you be supinating? couldn't they be supinating?
Perfect	V-ing perfect
couldn't I have supinated? couldn't you have supinated? couldn't he have supinated? couldn't we have supinated? couldn't you have supinated? couldn't they have supinated?	couldn't I have been supinating? couldn't you have been supinating? couldn't he have been supinating? couldn't we have been supinating? couldn't you have been supinating? couldn't they have been supinating?