English verb conjugation
COULD GRUBSTAKE

Regular verb: grubstake - grubstaked - grubstaked

Affirmation

Simple form	V-ing form
I could grubstake you could grubstake she could grubstake we could grubstake you could grubstake they could grubstake	I could be grubstaking you could be grubstaking she could be grubstaking we could be grubstaking you could be grubstaking they could be grubstaking
Perfect	V-ing perfect
I could have grubstaked you could have grubstaked she could have grubstaked we could have grubstaked you could have grubstaked they could have grubstaked	I could have been grubstaking you could have been grubstaking she could have been grubstaking we could have been grubstaking you could have been grubstaking they could have been grubstaking

Negation

Simple form	V-ing form
I could not grubstake you could not grubstake she could not grubstake we could not grubstake you could not grubstake they could not grubstake	I could not be grubstaking you could not be grubstaking she could not be grubstaking we could not be grubstaking you could not be grubstaking they could not be grubstaking
Perfect	V-ing perfect
I could not have grubstaked you could not have grubstaked she could not have grubstaked we could not have grubstaked you could not have grubstaked they could not have grubstaked	I could not have been grubstaking you could not have been grubstaking she could not have been grubstaking we could not have been grubstaking you could not have been grubstaking they could not have been grubstaking

Interrogative form

Simple form	V-ing form
could I grubstake? could you grubstake? could she grubstake? could we grubstake? could you grubstake? could they grubstake?	could I be grubstaking? could you be grubstaking? could she be grubstaking? could we be grubstaking? could you be grubstaking? could they be grubstaking?
Perfect	V-ing perfect
could I have grubstaked? could you have grubstaked? could she have grubstaked? could we have grubstaked? could you have grubstaked? could they have grubstaked?	could I have been grubstaking? could you have been grubstaking? could she have been grubstaking? could we have been grubstaking? could you have been grubstaking? could they have been grubstaking?

Interro-negative form

Simple form	V-ing form
could I not grubstake? could you not grubstake? could she not grubstake? could we not grubstake? could you not grubstake? could they not grubstake?	could I not be grubstaking? could you not be grubstaking? could she not be grubstaking? could we not be grubstaking? could you not be grubstaking? could they not be grubstaking?
Perfect	V-ing perfect
could I not have grubstaked? could you not have grubstaked? could she not have grubstaked? could we not have grubstaked? could you not have grubstaked? could they not have grubstaked?	could I not have been grubstaking? could you not have been grubstaking? could she not have been grubstaking? could we not have been grubstaking? could you not have been grubstaking? could they not have been grubstaking?