English verb conjugation
CAN CREST

Regular verb: crest - crested - crested

Affirmation

Simple form	V-ing form
I can crest you can crest she can crest we can crest you can crest they can crest	I can be cresting you can be cresting she 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 she 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 she 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 she 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 she 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 she 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 she 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 she crest? can we crest? can you crest? can they crest?	can I be cresting? can you be cresting? can she 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 she 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 she 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 she 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 she 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 she 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 she have been cresting? can't we have been cresting? can't you have been cresting? can't they have been cresting?