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 couldn't quest you couldn't quest he couldn't quest we couldn't quest you couldn't quest they couldn't quest	I couldn't be questing you couldn't be questing he couldn't be questing we couldn't be questing you couldn't be questing they couldn't be questing
Perfect	V-ing perfect
I couldn't have quested you couldn't have quested he couldn't have quested we couldn't have quested you couldn't have quested they couldn't have quested	I couldn't have been questing you couldn't have been questing he couldn't have been questing we couldn't have been questing you couldn't have been questing they couldn't 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
couldn't I quest? couldn't you quest? couldn't he quest? couldn't we quest? couldn't you quest? couldn't they quest?	couldn't I be questing? couldn't you be questing? couldn't he be questing? couldn't we be questing? couldn't you be questing? couldn't they be questing?
Perfect	V-ing perfect
couldn't I have quested? couldn't you have quested? couldn't he have quested? couldn't we have quested? couldn't you have quested? couldn't they have quested?	couldn't I have been questing? couldn't you have been questing? couldn't he have been questing? couldn't we have been questing? couldn't you have been questing? couldn't they have been questing?