English verb conjugation
COULD WANE

Regular verb: wane - waned - waned

Affirmation

Simple form	V-ing form
I could wane you could wane he could wane we could wane you could wane they could wane	I could be waning you could be waning he could be waning we could be waning you could be waning they could be waning
Perfect	V-ing perfect
I could have waned you could have waned he could have waned we could have waned you could have waned they could have waned	I could have been waning you could have been waning he could have been waning we could have been waning you could have been waning they could have been waning

Negation

Simple form	V-ing form
I couldn't wane you couldn't wane he couldn't wane we couldn't wane you couldn't wane they couldn't wane	I couldn't be waning you couldn't be waning he couldn't be waning we couldn't be waning you couldn't be waning they couldn't be waning
Perfect	V-ing perfect
I couldn't have waned you couldn't have waned he couldn't have waned we couldn't have waned you couldn't have waned they couldn't have waned	I couldn't have been waning you couldn't have been waning he couldn't have been waning we couldn't have been waning you couldn't have been waning they couldn't have been waning

Interrogative form

Simple form	V-ing form
could I wane? could you wane? could he wane? could we wane? could you wane? could they wane?	could I be waning? could you be waning? could he be waning? could we be waning? could you be waning? could they be waning?
Perfect	V-ing perfect
could I have waned? could you have waned? could he have waned? could we have waned? could you have waned? could they have waned?	could I have been waning? could you have been waning? could he have been waning? could we have been waning? could you have been waning? could they have been waning?

Interro-negative form

Simple form	V-ing form
couldn't I wane? couldn't you wane? couldn't he wane? couldn't we wane? couldn't you wane? couldn't they wane?	couldn't I be waning? couldn't you be waning? couldn't he be waning? couldn't we be waning? couldn't you be waning? couldn't they be waning?
Perfect	V-ing perfect
couldn't I have waned? couldn't you have waned? couldn't he have waned? couldn't we have waned? couldn't you have waned? couldn't they have waned?	couldn't I have been waning? couldn't you have been waning? couldn't he have been waning? couldn't we have been waning? couldn't you have been waning? couldn't they have been waning?