English verb conjugation
CAN FELL

Regular verb: fell - felled - felled

Affirmation

Simple form	V-ing form
I can fell you can fell she can fell we can fell you can fell they can fell	I can be felling you can be felling she can be felling we can be felling you can be felling they can be felling
Perfect	V-ing perfect
I can have felled you can have felled she can have felled we can have felled you can have felled they can have felled	I can have been felling you can have been felling she can have been felling we can have been felling you can have been felling they can have been felling

Negation

Simple form	V-ing form
I can't fell you can't fell she can't fell we can't fell you can't fell they can't fell	I can't be felling you can't be felling she can't be felling we can't be felling you can't be felling they can't be felling
Perfect	V-ing perfect
I can't have felled you can't have felled she can't have felled we can't have felled you can't have felled they can't have felled	I can't have been felling you can't have been felling she can't have been felling we can't have been felling you can't have been felling they can't have been felling

Interrogative form

Simple form	V-ing form
can I fell? can you fell? can she fell? can we fell? can you fell? can they fell?	can I be felling? can you be felling? can she be felling? can we be felling? can you be felling? can they be felling?
Perfect	V-ing perfect
can I have felled? can you have felled? can she have felled? can we have felled? can you have felled? can they have felled?	can I have been felling? can you have been felling? can she have been felling? can we have been felling? can you have been felling? can they have been felling?

Interro-negative form

Simple form	V-ing form
can't I fell? can't you fell? can't she fell? can't we fell? can't you fell? can't they fell?	can't I be felling? can't you be felling? can't she be felling? can't we be felling? can't you be felling? can't they be felling?
Perfect	V-ing perfect
can't I have felled? can't you have felled? can't she have felled? can't we have felled? can't you have felled? can't they have felled?	can't I have been felling? can't you have been felling? can't she have been felling? can't we have been felling? can't you have been felling? can't they have been felling?