English verb conjugation
CAN CREST

Regular verb: crest - crested - crested

Affirmation

Simple form	V-ing form
I can crest you can crest he can crest we can crest you can crest they can crest	I can be cresting you can be cresting he can be cresting we can be cresting you can be cresting they can be cresting
Perfect	V-ing perfect
I can have crested you can have crested he can have crested we can have crested you can have crested they can have crested	I can have been cresting you can have been cresting he can have been cresting we can have been cresting you can have been cresting they can have been cresting

Negation

Simple form	V-ing form
I can't crest you can't crest he can't crest we can't crest you can't crest they can't crest	I can't be cresting you can't be cresting he can't be cresting we can't be cresting you can't be cresting they can't be cresting
Perfect	V-ing perfect
I can't have crested you can't have crested he can't have crested we can't have crested you can't have crested they can't have crested	I can't have been cresting you can't have been cresting he can't have been cresting we can't have been cresting you can't have been cresting they can't have been cresting

Interrogative form

Simple form	V-ing form
can I crest? can you crest? can he crest? can we crest? can you crest? can they crest?	can I be cresting? can you be cresting? can he be cresting? can we be cresting? can you be cresting? can they be cresting?
Perfect	V-ing perfect
can I have crested? can you have crested? can he have crested? can we have crested? can you have crested? can they have crested?	can I have been cresting? can you have been cresting? can he have been cresting? can we have been cresting? can you have been cresting? can they have been cresting?

Interro-negative form

Simple form	V-ing form
can't I crest? can't you crest? can't he crest? can't we crest? can't you crest? can't they crest?	can't I be cresting? can't you be cresting? can't he be cresting? can't we be cresting? can't you be cresting? can't they be cresting?
Perfect	V-ing perfect
can't I have crested? can't you have crested? can't he have crested? can't we have crested? can't you have crested? can't they have crested?	can't I have been cresting? can't you have been cresting? can't he have been cresting? can't we have been cresting? can't you have been cresting? can't they have been cresting?