English verb conjugation
COULD WINTER

Regular verb: winter - wintered - wintered

Affirmation

Simple form	V-ing form
I could winter you could winter he could winter we could winter you could winter they could winter	I could be wintering you could be wintering he could be wintering we could be wintering you could be wintering they could be wintering
Perfect	V-ing perfect
I could have wintered you could have wintered he could have wintered we could have wintered you could have wintered they could have wintered	I could have been wintering you could have been wintering he could have been wintering we could have been wintering you could have been wintering they could have been wintering

Negation

Simple form	V-ing form
I couldn't winter you couldn't winter he couldn't winter we couldn't winter you couldn't winter they couldn't winter	I couldn't be wintering you couldn't be wintering he couldn't be wintering we couldn't be wintering you couldn't be wintering they couldn't be wintering
Perfect	V-ing perfect
I couldn't have wintered you couldn't have wintered he couldn't have wintered we couldn't have wintered you couldn't have wintered they couldn't have wintered	I couldn't have been wintering you couldn't have been wintering he couldn't have been wintering we couldn't have been wintering you couldn't have been wintering they couldn't have been wintering

Interrogative form

Simple form	V-ing form
could I winter? could you winter? could he winter? could we winter? could you winter? could they winter?	could I be wintering? could you be wintering? could he be wintering? could we be wintering? could you be wintering? could they be wintering?
Perfect	V-ing perfect
could I have wintered? could you have wintered? could he have wintered? could we have wintered? could you have wintered? could they have wintered?	could I have been wintering? could you have been wintering? could he have been wintering? could we have been wintering? could you have been wintering? could they have been wintering?

Interro-negative form

Simple form	V-ing form
couldn't I winter? couldn't you winter? couldn't he winter? couldn't we winter? couldn't you winter? couldn't they winter?	couldn't I be wintering? couldn't you be wintering? couldn't he be wintering? couldn't we be wintering? couldn't you be wintering? couldn't they be wintering?
Perfect	V-ing perfect
couldn't I have wintered? couldn't you have wintered? couldn't he have wintered? couldn't we have wintered? couldn't you have wintered? couldn't they have wintered?	couldn't I have been wintering? couldn't you have been wintering? couldn't he have been wintering? couldn't we have been wintering? couldn't you have been wintering? couldn't they have been wintering?