can preboard
Verbe régulier : preboard - preboarded- preboarded

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I can preboard
you can preboard
she can preboard
we can preboard
you can preboard
they can preboard 	I can be preboarding
you can be preboarding
she can be preboarding
we can be preboarding
you can be preboarding
they can be preboarding	I can have preboarded
you can have preboarded
she can have preboarded
we can have preboarded
you can have preboarded
they can have preboarded	I can have been preboarding
you can have been preboarding
she can have been preboarding
we can have been preboarding
you can have been preboarding
they can have been preboarding	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I cannot preboard
you cannot preboard
she cannot preboard
we cannot preboard
you cannot preboard
they cannot preboard 	I cannot be preboarding
you cannot be preboarding
she cannot be preboarding
we cannot be preboarding
you cannot be preboarding
they cannot be preboarding	I cannot have preboarded
you cannot have preboarded
she cannot have preboarded
we cannot have preboarded
you cannot have preboarded
they cannot have preboarded	I cannot have been preboarding
you cannot have been preboarding
she cannot have been preboarding
we cannot have been preboarding
you cannot have been preboarding
they cannot have been preboarding	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
can I preboard?
can you preboard?
can she preboard?
can we preboard?
can you preboard?
can they preboard? 	can I be preboarding?
can you be preboarding?
can she be preboarding?
can we be preboarding?
can you be preboarding?
can they be preboarding? 	can I have preboarded?
can you have preboarded?
can she have preboarded?
can we have preboarded?
can you have preboarded?
can they have preboarded? 	can I have been preboarding?
can you have been preboarding?
can she have been preboarding?
can we have been preboarding?
can you have been preboarding?
can they have been preboarding? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
can I not preboard?
can you not preboard?
can she not preboard?
can we not preboard?
can you not preboard?
can they not preboard? 	can I not be preboarding?
can you not be preboarding?
can she not be preboarding?
can we not be preboarding?
can you not be preboarding?
can they not be preboarding? 	can I not have preboarded?
can you not have preboarded?
can she not have preboarded?
can we not have preboarded?
can you not have preboarded?
can they not have preboarded? 	can I not have been preboarding?
can you not have been preboarding?
can she not have been preboarding?
can we not have been preboarding?
can you not have been preboarding?
can they not have been preboarding?