English verb conjugation
CAN MUTTER

Regular verb: mutter - muttered - muttered

Affirmation

Simple form	V-ing form
I can mutter you can mutter he can mutter we can mutter you can mutter they can mutter	I can be muttering you can be muttering he can be muttering we can be muttering you can be muttering they can be muttering
Perfect	V-ing perfect
I can have muttered you can have muttered he can have muttered we can have muttered you can have muttered they can have muttered	I can have been muttering you can have been muttering he can have been muttering we can have been muttering you can have been muttering they can have been muttering

Negation

Simple form	V-ing form
I can't mutter you can't mutter he can't mutter we can't mutter you can't mutter they can't mutter	I can't be muttering you can't be muttering he can't be muttering we can't be muttering you can't be muttering they can't be muttering
Perfect	V-ing perfect
I can't have muttered you can't have muttered he can't have muttered we can't have muttered you can't have muttered they can't have muttered	I can't have been muttering you can't have been muttering he can't have been muttering we can't have been muttering you can't have been muttering they can't have been muttering

Interrogative form

Simple form	V-ing form
can I mutter? can you mutter? can he mutter? can we mutter? can you mutter? can they mutter?	can I be muttering? can you be muttering? can he be muttering? can we be muttering? can you be muttering? can they be muttering?
Perfect	V-ing perfect
can I have muttered? can you have muttered? can he have muttered? can we have muttered? can you have muttered? can they have muttered?	can I have been muttering? can you have been muttering? can he have been muttering? can we have been muttering? can you have been muttering? can they have been muttering?

Interro-negative form

Simple form	V-ing form
can't I mutter? can't you mutter? can't he mutter? can't we mutter? can't you mutter? can't they mutter?	can't I be muttering? can't you be muttering? can't he be muttering? can't we be muttering? can't you be muttering? can't they be muttering?
Perfect	V-ing perfect
can't I have muttered? can't you have muttered? can't he have muttered? can't we have muttered? can't you have muttered? can't they have muttered?	can't I have been muttering? can't you have been muttering? can't he have been muttering? can't we have been muttering? can't you have been muttering? can't they have been muttering?