shall preboard
Regular verb: preboard - preboarded- preboarded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shall preboard
you shall preboard
she shall preboard
we shall preboard
you shall preboard
they shall preboard 	I shall be preboarding
you shall be preboarding
she shall be preboarding
we shall be preboarding
you shall be preboarding
they shall be preboarding	I shall have preboarded
you shall have preboarded
she shall have preboarded
we shall have preboarded
you shall have preboarded
they shall have preboarded	I shall have been preboarding
you shall have been preboarding
she shall have been preboarding
we shall have been preboarding
you shall have been preboarding
they shall have been preboarding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shall not preboard
you shall not preboard
she shall not preboard
we shall not preboard
you shall not preboard
they shall not preboard 	I shall not be preboarding
you shall not be preboarding
she shall not be preboarding
we shall not be preboarding
you shall not be preboarding
they shall not be preboarding	I shall not have preboarded
you shall not have preboarded
she shall not have preboarded
we shall not have preboarded
you shall not have preboarded
they shall not have preboarded	I shall not have been preboarding
you shall not have been preboarding
she shall not have been preboarding
we shall not have been preboarding
you shall not have been preboarding
they shall not have been preboarding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shall I preboard?
shall you preboard?
shall she preboard?
shall we preboard?
shall you preboard?
shall they preboard? 	shall I be preboarding?
shall you be preboarding?
shall she be preboarding?
shall we be preboarding?
shall you be preboarding?
shall they be preboarding? 	shall I have preboarded?
shall you have preboarded?
shall she have preboarded?
shall we have preboarded?
shall you have preboarded?
shall they have preboarded? 	shall I have been preboarding?
shall you have been preboarding?
shall she have been preboarding?
shall we have been preboarding?
shall you have been preboarding?
shall they have been preboarding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shall I not preboard?
shall you not preboard?
shall she not preboard?
shall we not preboard?
shall you not preboard?
shall they not preboard? 	shall I not be preboarding?
shall you not be preboarding?
shall she not be preboarding?
shall we not be preboarding?
shall you not be preboarding?
shall they not be preboarding? 	shall I not have preboarded?
shall you not have preboarded?
shall she not have preboarded?
shall we not have preboarded?
shall you not have preboarded?
shall they not have preboarded? 	shall I not have been preboarding?
shall you not have been preboarding?
shall she not have been preboarding?
shall we not have been preboarding?
shall you not have been preboarding?
shall they not have been preboarding?