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 cannot ground you cannot ground he cannot ground we cannot ground you cannot ground they cannot ground	I cannot be grounding you cannot be grounding he cannot be grounding we cannot be grounding you cannot be grounding they cannot be grounding
Perfect	V-ing perfect
I cannot have grounded you cannot have grounded he cannot have grounded we cannot have grounded you cannot have grounded they cannot have grounded	I cannot have been grounding you cannot have been grounding he cannot have been grounding we cannot have been grounding you cannot have been grounding they cannot 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 I not ground? can you not ground? can he not ground? can we not ground? can you not ground? can they not ground?	can I not be grounding? can you not be grounding? can he not be grounding? can we not be grounding? can you not be grounding? can they not be grounding?
Perfect	V-ing perfect
can I not have grounded? can you not have grounded? can he not have grounded? can we not have grounded? can you not have grounded? can they not have grounded?	can I not have been grounding? can you not have been grounding? can he not have been grounding? can we not have been grounding? can you not have been grounding? can they not have been grounding?