English verb conjugation
COULD CARBON-DATE

Regular verb: carbon-date - carbon-dated - carbon-dated

Affirmation

Simple form	V-ing form
I could carbon-date you could carbon-date he could carbon-date we could carbon-date you could carbon-date they could carbon-date	I could be carbon-dating you could be carbon-dating he could be carbon-dating we could be carbon-dating you could be carbon-dating they could be carbon-dating
Perfect	V-ing perfect
I could have carbon-dated you could have carbon-dated he could have carbon-dated we could have carbon-dated you could have carbon-dated they could have carbon-dated	I could have been carbon-dating you could have been carbon-dating he could have been carbon-dating we could have been carbon-dating you could have been carbon-dating they could have been carbon-dating

Negation

Simple form	V-ing form
I could not carbon-date you could not carbon-date he could not carbon-date we could not carbon-date you could not carbon-date they could not carbon-date	I could not be carbon-dating you could not be carbon-dating he could not be carbon-dating we could not be carbon-dating you could not be carbon-dating they could not be carbon-dating
Perfect	V-ing perfect
I could not have carbon-dated you could not have carbon-dated he could not have carbon-dated we could not have carbon-dated you could not have carbon-dated they could not have carbon-dated	I could not have been carbon-dating you could not have been carbon-dating he could not have been carbon-dating we could not have been carbon-dating you could not have been carbon-dating they could not have been carbon-dating

Interrogative form

Simple form	V-ing form
could I carbon-date? could you carbon-date? could he carbon-date? could we carbon-date? could you carbon-date? could they carbon-date?	could I be carbon-dating? could you be carbon-dating? could he be carbon-dating? could we be carbon-dating? could you be carbon-dating? could they be carbon-dating?
Perfect	V-ing perfect
could I have carbon-dated? could you have carbon-dated? could he have carbon-dated? could we have carbon-dated? could you have carbon-dated? could they have carbon-dated?	could I have been carbon-dating? could you have been carbon-dating? could he have been carbon-dating? could we have been carbon-dating? could you have been carbon-dating? could they have been carbon-dating?

Interro-negative form

Simple form	V-ing form
could I not carbon-date? could you not carbon-date? could he not carbon-date? could we not carbon-date? could you not carbon-date? could they not carbon-date?	could I not be carbon-dating? could you not be carbon-dating? could he not be carbon-dating? could we not be carbon-dating? could you not be carbon-dating? could they not be carbon-dating?
Perfect	V-ing perfect
could I not have carbon-dated? could you not have carbon-dated? could he not have carbon-dated? could we not have carbon-dated? could you not have carbon-dated? could they not have carbon-dated?	could I not have been carbon-dating? could you not have been carbon-dating? could he not have been carbon-dating? could we not have been carbon-dating? could you not have been carbon-dating? could they not have been carbon-dating?