English verb conjugation
COULD WORRY

Regular verb: worry - worried - worried

Affirmation

Simple form	V-ing form
I could worry you could worry he could worry we could worry you could worry they could worry	I could be worrying you could be worrying he could be worrying we could be worrying you could be worrying they could be worrying
Perfect	V-ing perfect
I could have worried you could have worried he could have worried we could have worried you could have worried they could have worried	I could have been worrying you could have been worrying he could have been worrying we could have been worrying you could have been worrying they could have been worrying

Negation

Simple form	V-ing form
I couldn't worry you couldn't worry he couldn't worry we couldn't worry you couldn't worry they couldn't worry	I couldn't be worrying you couldn't be worrying he couldn't be worrying we couldn't be worrying you couldn't be worrying they couldn't be worrying
Perfect	V-ing perfect
I couldn't have worried you couldn't have worried he couldn't have worried we couldn't have worried you couldn't have worried they couldn't have worried	I couldn't have been worrying you couldn't have been worrying he couldn't have been worrying we couldn't have been worrying you couldn't have been worrying they couldn't have been worrying

Interrogative form

Simple form	V-ing form
could I worry? could you worry? could he worry? could we worry? could you worry? could they worry?	could I be worrying? could you be worrying? could he be worrying? could we be worrying? could you be worrying? could they be worrying?
Perfect	V-ing perfect
could I have worried? could you have worried? could he have worried? could we have worried? could you have worried? could they have worried?	could I have been worrying? could you have been worrying? could he have been worrying? could we have been worrying? could you have been worrying? could they have been worrying?

Interro-negative form

Simple form	V-ing form
couldn't I worry? couldn't you worry? couldn't he worry? couldn't we worry? couldn't you worry? couldn't they worry?	couldn't I be worrying? couldn't you be worrying? couldn't he be worrying? couldn't we be worrying? couldn't you be worrying? couldn't they be worrying?
Perfect	V-ing perfect
couldn't I have worried? couldn't you have worried? couldn't he have worried? couldn't we have worried? couldn't you have worried? couldn't they have worried?	couldn't I have been worrying? couldn't you have been worrying? couldn't he have been worrying? couldn't we have been worrying? couldn't you have been worrying? couldn't they have been worrying?