English verb conjugation
CAN BERTH

Regular verb: berth - berthed - berthed

Affirmation

Simple form	V-ing form
I can berth you can berth he can berth we can berth you can berth they can berth	I can be berthing you can be berthing he can be berthing we can be berthing you can be berthing they can be berthing
Perfect	V-ing perfect
I can have berthed you can have berthed he 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 he 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
I can't berth you can't berth he 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 he can't be berthing we can't be berthing you can't be berthing they can't be berthing
Perfect	V-ing perfect
I can't have berthed you can't have berthed he 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 he 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
can I berth? can you berth? can he berth? can we berth? can you berth? can they berth?	can I be berthing? can you be berthing? can he be berthing? can we be berthing? can you be berthing? can they be berthing?
Perfect	V-ing perfect
can I have berthed? can you have berthed? can he 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 he 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
can't I berth? can't you berth? can't he 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 he be berthing? can't we be berthing? can't you be berthing? can't they be berthing?
Perfect	V-ing perfect
can't I have berthed? can't you have berthed? can't he 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 he have been berthing? can't we have been berthing? can't you have been berthing? can't they have been berthing?