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 can't berth
you can't berth
she can't berth
we can't berth
you can't berth
they can't berth 	I can't be berthing
you can't be berthing
she can't be berthing
we can't be berthing
you can't be berthing
they can't be berthing	I can't have berthed
you can't have berthed
she can't have berthed
we can't have berthed
you can't have berthed
they can't have berthed	I can't have been berthing
you can't have been berthing
she can't have been berthing
we can't have been berthing
you can't have been berthing
they can't 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't I berth?
can't you berth?
can't she berth?
can't we berth?
can't you berth?
can't they berth? 	can't I be berthing?
can't you be berthing?
can't she be berthing?
can't we be berthing?
can't you be berthing?
can't they be berthing? 	can't I have berthed?
can't you have berthed?
can't she have berthed?
can't we have berthed?
can't you have berthed?
can't they have berthed? 	can't I have been berthing?
can't you have been berthing?
can't she have been berthing?
can't we have been berthing?
can't you have been berthing?
can't they have been berthing?