English verb conjugation
CAN BERTH

Regular verb: berth - berthed - berthed

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?