English verb conjugation
COULD QUEST

Regular verb: quest - quested - quested

Affirmation

Simple form	V-ing form
I could quest you could quest he could quest we could quest you could quest they could quest	I could be questing you could be questing he could be questing we could be questing you could be questing they could be questing
Perfect	V-ing perfect
I could have quested you could have quested he could have quested we could have quested you could have quested they could have quested	I could have been questing you could have been questing he could have been questing we could have been questing you could have been questing they could have been questing

Negation

Simple form	V-ing form
I could not quest you could not quest he could not quest we could not quest you could not quest they could not quest	I could not be questing you could not be questing he could not be questing we could not be questing you could not be questing they could not be questing
Perfect	V-ing perfect
I could not have quested you could not have quested he could not have quested we could not have quested you could not have quested they could not have quested	I could not have been questing you could not have been questing he could not have been questing we could not have been questing you could not have been questing they could not have been questing

Interrogative form

Simple form	V-ing form
could I quest? could you quest? could he quest? could we quest? could you quest? could they quest?	could I be questing? could you be questing? could he be questing? could we be questing? could you be questing? could they be questing?
Perfect	V-ing perfect
could I have quested? could you have quested? could he have quested? could we have quested? could you have quested? could they have quested?	could I have been questing? could you have been questing? could he have been questing? could we have been questing? could you have been questing? could they have been questing?

Interro-negative form

Simple form	V-ing form
could I not quest? could you not quest? could he not quest? could we not quest? could you not quest? could they not quest?	could I not be questing? could you not be questing? could he not be questing? could we not be questing? could you not be questing? could they not be questing?
Perfect	V-ing perfect
could I not have quested? could you not have quested? could he not have quested? could we not have quested? could you not have quested? could they not have quested?	could I not have been questing? could you not have been questing? could he not have been questing? could we not have been questing? could you not have been questing? could they not have been questing?