English verb conjugation
CAN GRAVEL

Regular verb: gravel - gravelled - gravelled

Affirmation

Simple form	V-ing form
I can gravel you can gravel he can gravel we can gravel you can gravel they can gravel	I can be gravelling you can be gravelling he can be gravelling we can be gravelling you can be gravelling they can be gravelling
Perfect	V-ing perfect
I can have gravelled you can have gravelled he can have gravelled we can have gravelled you can have gravelled they can have gravelled	I can have been gravelling you can have been gravelling he can have been gravelling we can have been gravelling you can have been gravelling they can have been gravelling

Negation

Simple form	V-ing form
I can't gravel you can't gravel he can't gravel we can't gravel you can't gravel they can't gravel	I can't be gravelling you can't be gravelling he can't be gravelling we can't be gravelling you can't be gravelling they can't be gravelling
Perfect	V-ing perfect
I can't have gravelled you can't have gravelled he can't have gravelled we can't have gravelled you can't have gravelled they can't have gravelled	I can't have been gravelling you can't have been gravelling he can't have been gravelling we can't have been gravelling you can't have been gravelling they can't have been gravelling

Interrogative form

Simple form	V-ing form
can I gravel? can you gravel? can he gravel? can we gravel? can you gravel? can they gravel?	can I be gravelling? can you be gravelling? can he be gravelling? can we be gravelling? can you be gravelling? can they be gravelling?
Perfect	V-ing perfect
can I have gravelled? can you have gravelled? can he have gravelled? can we have gravelled? can you have gravelled? can they have gravelled?	can I have been gravelling? can you have been gravelling? can he have been gravelling? can we have been gravelling? can you have been gravelling? can they have been gravelling?

Interro-negative form

Simple form	V-ing form
can't I gravel? can't you gravel? can't he gravel? can't we gravel? can't you gravel? can't they gravel?	can't I be gravelling? can't you be gravelling? can't he be gravelling? can't we be gravelling? can't you be gravelling? can't they be gravelling?
Perfect	V-ing perfect
can't I have gravelled? can't you have gravelled? can't he have gravelled? can't we have gravelled? can't you have gravelled? can't they have gravelled?	can't I have been gravelling? can't you have been gravelling? can't he have been gravelling? can't we have been gravelling? can't you have been gravelling? can't they have been gravelling?