can berth
Regular verb: berth - berthed- berthed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can berth
you can berth
she can berth
we can berth
you can berth
they can berth 	I can be berthing
you can be berthing
she can be berthing
we can be berthing
you can be berthing
they can be berthing	I can have berthed
you can have berthed
she can have berthed
we can have berthed
you can have berthed
they can have berthed	I can have been berthing
you can have been berthing
she can have been berthing
we can have been berthing
you can have been berthing
they can have been berthing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot berth
you cannot berth
she cannot berth
we cannot berth
you cannot berth
they cannot berth 	I cannot be berthing
you cannot be berthing
she cannot be berthing
we cannot be berthing
you cannot be berthing
they cannot be berthing	I cannot have berthed
you cannot have berthed
she cannot have berthed
we cannot have berthed
you cannot have berthed
they cannot have berthed	I cannot have been berthing
you cannot have been berthing
she cannot have been berthing
we cannot have been berthing
you cannot have been berthing
they cannot have been berthing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I berth?
can you berth?
can she berth?
can we berth?
can you berth?
can they berth? 	can I be berthing?
can you be berthing?
can she be berthing?
can we be berthing?
can you be berthing?
can they be berthing? 	can I have berthed?
can you have berthed?
can she have berthed?
can we have berthed?
can you have berthed?
can they have berthed? 	can I have been berthing?
can you have been berthing?
can she have been berthing?
can we have been berthing?
can you have been berthing?
can they have been berthing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not berth?
can you not berth?
can she not berth?
can we not berth?
can you not berth?
can they not berth? 	can I not be berthing?
can you not be berthing?
can she not be berthing?
can we not be berthing?
can you not be berthing?
can they not be berthing? 	can I not have berthed?
can you not have berthed?
can she not have berthed?
can we not have berthed?
can you not have berthed?
can they not have berthed? 	can I not have been berthing?
can you not have been berthing?
can she not have been berthing?
can we not have been berthing?
can you not have been berthing?
can they not have been berthing?