English verb conjugation
CAN GROUND

Regular verb: ground - grounded - grounded

Affirmation

Simple form	V-ing form
I can ground you can ground he can ground we can ground you can ground they can ground	I can be grounding you can be grounding he can be grounding we can be grounding you can be grounding they can be grounding
Perfect	V-ing perfect
I can have grounded you can have grounded he can have grounded we can have grounded you can have grounded they can have grounded	I can have been grounding you can have been grounding he can have been grounding we can have been grounding you can have been grounding they can have been grounding

Negation

Simple form	V-ing form
I can't ground you can't ground he can't ground we can't ground you can't ground they can't ground	I can't be grounding you can't be grounding he can't be grounding we can't be grounding you can't be grounding they can't be grounding
Perfect	V-ing perfect
I can't have grounded you can't have grounded he can't have grounded we can't have grounded you can't have grounded they can't have grounded	I can't have been grounding you can't have been grounding he can't have been grounding we can't have been grounding you can't have been grounding they can't have been grounding

Interrogative form

Simple form	V-ing form
can I ground? can you ground? can he ground? can we ground? can you ground? can they ground?	can I be grounding? can you be grounding? can he be grounding? can we be grounding? can you be grounding? can they be grounding?
Perfect	V-ing perfect
can I have grounded? can you have grounded? can he have grounded? can we have grounded? can you have grounded? can they have grounded?	can I have been grounding? can you have been grounding? can he have been grounding? can we have been grounding? can you have been grounding? can they have been grounding?

Interro-negative form

Simple form	V-ing form
can't I ground? can't you ground? can't he ground? can't we ground? can't you ground? can't they ground?	can't I be grounding? can't you be grounding? can't he be grounding? can't we be grounding? can't you be grounding? can't they be grounding?
Perfect	V-ing perfect
can't I have grounded? can't you have grounded? can't he have grounded? can't we have grounded? can't you have grounded? can't they have grounded?	can't I have been grounding? can't you have been grounding? can't he have been grounding? can't we have been grounding? can't you have been grounding? can't they have been grounding?