English verb conjugation
CAN TREBLE

Regular verb: treble - trebled - trebled

Affirmation

Simple form	V-ing form
I can treble you can treble he can treble we can treble you can treble they can treble	I can be trebling you can be trebling he can be trebling we can be trebling you can be trebling they can be trebling
Perfect	V-ing perfect
I can have trebled you can have trebled he can have trebled we can have trebled you can have trebled they can have trebled	I can have been trebling you can have been trebling he can have been trebling we can have been trebling you can have been trebling they can have been trebling

Negation

Simple form	V-ing form
I cannot treble you cannot treble he cannot treble we cannot treble you cannot treble they cannot treble	I cannot be trebling you cannot be trebling he cannot be trebling we cannot be trebling you cannot be trebling they cannot be trebling
Perfect	V-ing perfect
I cannot have trebled you cannot have trebled he cannot have trebled we cannot have trebled you cannot have trebled they cannot have trebled	I cannot have been trebling you cannot have been trebling he cannot have been trebling we cannot have been trebling you cannot have been trebling they cannot have been trebling

Interrogative form

Simple form	V-ing form
can I treble? can you treble? can he treble? can we treble? can you treble? can they treble?	can I be trebling? can you be trebling? can he be trebling? can we be trebling? can you be trebling? can they be trebling?
Perfect	V-ing perfect
can I have trebled? can you have trebled? can he have trebled? can we have trebled? can you have trebled? can they have trebled?	can I have been trebling? can you have been trebling? can he have been trebling? can we have been trebling? can you have been trebling? can they have been trebling?

Interro-negative form

Simple form	V-ing form
can I not treble? can you not treble? can he not treble? can we not treble? can you not treble? can they not treble?	can I not be trebling? can you not be trebling? can he not be trebling? can we not be trebling? can you not be trebling? can they not be trebling?
Perfect	V-ing perfect
can I not have trebled? can you not have trebled? can he not have trebled? can we not have trebled? can you not have trebled? can they not have trebled?	can I not have been trebling? can you not have been trebling? can he not have been trebling? can we not have been trebling? can you not have been trebling? can they not have been trebling?