English verb conjugation
COULD PRETEST

Regular verb: pretest - pretested - pretested

Affirmation

Simple form	V-ing form
I could pretest you could pretest she could pretest we could pretest you could pretest they could pretest	I could be pretesting you could be pretesting she could be pretesting we could be pretesting you could be pretesting they could be pretesting
Perfect	V-ing perfect
I could have pretested you could have pretested she could have pretested we could have pretested you could have pretested they could have pretested	I could have been pretesting you could have been pretesting she could have been pretesting we could have been pretesting you could have been pretesting they could have been pretesting

Negation

Simple form	V-ing form
I could not pretest you could not pretest she could not pretest we could not pretest you could not pretest they could not pretest	I could not be pretesting you could not be pretesting she could not be pretesting we could not be pretesting you could not be pretesting they could not be pretesting
Perfect	V-ing perfect
I could not have pretested you could not have pretested she could not have pretested we could not have pretested you could not have pretested they could not have pretested	I could not have been pretesting you could not have been pretesting she could not have been pretesting we could not have been pretesting you could not have been pretesting they could not have been pretesting

Interrogative form

Simple form	V-ing form
could I pretest? could you pretest? could she pretest? could we pretest? could you pretest? could they pretest?	could I be pretesting? could you be pretesting? could she be pretesting? could we be pretesting? could you be pretesting? could they be pretesting?
Perfect	V-ing perfect
could I have pretested? could you have pretested? could she have pretested? could we have pretested? could you have pretested? could they have pretested?	could I have been pretesting? could you have been pretesting? could she have been pretesting? could we have been pretesting? could you have been pretesting? could they have been pretesting?

Interro-negative form

Simple form	V-ing form
could I not pretest? could you not pretest? could she not pretest? could we not pretest? could you not pretest? could they not pretest?	could I not be pretesting? could you not be pretesting? could she not be pretesting? could we not be pretesting? could you not be pretesting? could they not be pretesting?
Perfect	V-ing perfect
could I not have pretested? could you not have pretested? could she not have pretested? could we not have pretested? could you not have pretested? could they not have pretested?	could I not have been pretesting? could you not have been pretesting? could she not have been pretesting? could we not have been pretesting? could you not have been pretesting? could they not have been pretesting?