English verb conjugation
COULD LUSTER

Regular verb: luster - lustered - lustered

Affirmation

Simple form	V-ing form
I could luster you could luster he could luster we could luster you could luster they could luster	I could be lustering you could be lustering he could be lustering we could be lustering you could be lustering they could be lustering
Perfect	V-ing perfect
I could have lustered you could have lustered he could have lustered we could have lustered you could have lustered they could have lustered	I could have been lustering you could have been lustering he could have been lustering we could have been lustering you could have been lustering they could have been lustering

Negation

Simple form	V-ing form
I couldn't luster you couldn't luster he couldn't luster we couldn't luster you couldn't luster they couldn't luster	I couldn't be lustering you couldn't be lustering he couldn't be lustering we couldn't be lustering you couldn't be lustering they couldn't be lustering
Perfect	V-ing perfect
I couldn't have lustered you couldn't have lustered he couldn't have lustered we couldn't have lustered you couldn't have lustered they couldn't have lustered	I couldn't have been lustering you couldn't have been lustering he couldn't have been lustering we couldn't have been lustering you couldn't have been lustering they couldn't have been lustering

Interrogative form

Simple form	V-ing form
could I luster? could you luster? could he luster? could we luster? could you luster? could they luster?	could I be lustering? could you be lustering? could he be lustering? could we be lustering? could you be lustering? could they be lustering?
Perfect	V-ing perfect
could I have lustered? could you have lustered? could he have lustered? could we have lustered? could you have lustered? could they have lustered?	could I have been lustering? could you have been lustering? could he have been lustering? could we have been lustering? could you have been lustering? could they have been lustering?

Interro-negative form

Simple form	V-ing form
couldn't I luster? couldn't you luster? couldn't he luster? couldn't we luster? couldn't you luster? couldn't they luster?	couldn't I be lustering? couldn't you be lustering? couldn't he be lustering? couldn't we be lustering? couldn't you be lustering? couldn't they be lustering?
Perfect	V-ing perfect
couldn't I have lustered? couldn't you have lustered? couldn't he have lustered? couldn't we have lustered? couldn't you have lustered? couldn't they have lustered?	couldn't I have been lustering? couldn't you have been lustering? couldn't he have been lustering? couldn't we have been lustering? couldn't you have been lustering? couldn't they have been lustering?