English verb conjugation
CAN QUEST

Regular verb: quest - quested - quested

Affirmation

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

Negation

Simple form	V-ing form
I can't quest you can't quest he can't quest we can't quest you can't quest they can't quest	I can't be questing you can't be questing he can't be questing we can't be questing you can't be questing they can't be questing
Perfect	V-ing perfect
I can't have quested you can't have quested he can't have quested we can't have quested you can't have quested they can't have quested	I can't have been questing you can't have been questing he can't have been questing we can't have been questing you can't have been questing they can't have been questing

Interrogative form

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

Interro-negative form

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