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 can't treble you can't treble he can't treble we can't treble you can't treble they can't treble	I can't be trebling you can't be trebling he can't be trebling we can't be trebling you can't be trebling they can't be trebling
Perfect	V-ing perfect
I can't have trebled you can't have trebled he can't have trebled we can't have trebled you can't have trebled they can't have trebled	I can't have been trebling you can't have been trebling he can't have been trebling we can't have been trebling you can't have been trebling they can't 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't I treble? can't you treble? can't he treble? can't we treble? can't you treble? can't they treble?	can't I be trebling? can't you be trebling? can't he be trebling? can't we be trebling? can't you be trebling? can't they be trebling?
Perfect	V-ing perfect
can't I have trebled? can't you have trebled? can't he have trebled? can't we have trebled? can't you have trebled? can't they have trebled?	can't I have been trebling? can't you have been trebling? can't he have been trebling? can't we have been trebling? can't you have been trebling? can't they have been trebling?