English verb conjugation
CAN PUTTER

Regular verb: putter - puttered - puttered

Affirmation

Simple form	V-ing form
I can putter you can putter he can putter we can putter you can putter they can putter	I can be puttering you can be puttering he can be puttering we can be puttering you can be puttering they can be puttering
Perfect	V-ing perfect
I can have puttered you can have puttered he can have puttered we can have puttered you can have puttered they can have puttered	I can have been puttering you can have been puttering he can have been puttering we can have been puttering you can have been puttering they can have been puttering

Negation

Simple form	V-ing form
I cannot putter you cannot putter he cannot putter we cannot putter you cannot putter they cannot putter	I cannot be puttering you cannot be puttering he cannot be puttering we cannot be puttering you cannot be puttering they cannot be puttering
Perfect	V-ing perfect
I cannot have puttered you cannot have puttered he cannot have puttered we cannot have puttered you cannot have puttered they cannot have puttered	I cannot have been puttering you cannot have been puttering he cannot have been puttering we cannot have been puttering you cannot have been puttering they cannot have been puttering

Interrogative form

Simple form	V-ing form
can I putter? can you putter? can he putter? can we putter? can you putter? can they putter?	can I be puttering? can you be puttering? can he be puttering? can we be puttering? can you be puttering? can they be puttering?
Perfect	V-ing perfect
can I have puttered? can you have puttered? can he have puttered? can we have puttered? can you have puttered? can they have puttered?	can I have been puttering? can you have been puttering? can he have been puttering? can we have been puttering? can you have been puttering? can they have been puttering?

Interro-negative form

Simple form	V-ing form
can I not putter? can you not putter? can he not putter? can we not putter? can you not putter? can they not putter?	can I not be puttering? can you not be puttering? can he not be puttering? can we not be puttering? can you not be puttering? can they not be puttering?
Perfect	V-ing perfect
can I not have puttered? can you not have puttered? can he not have puttered? can we not have puttered? can you not have puttered? can they not have puttered?	can I not have been puttering? can you not have been puttering? can he not have been puttering? can we not have been puttering? can you not have been puttering? can they not have been puttering?