English verb conjugation
CAN GRUBSTAKE

Regular verb: grubstake - grubstaked - grubstaked

Affirmation

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

Negation

Simple form	V-ing form
I cannot grubstake you cannot grubstake he cannot grubstake we cannot grubstake you cannot grubstake they cannot grubstake	I cannot be grubstaking you cannot be grubstaking he cannot be grubstaking we cannot be grubstaking you cannot be grubstaking they cannot be grubstaking
Perfect	V-ing perfect
I cannot have grubstaked you cannot have grubstaked he cannot have grubstaked we cannot have grubstaked you cannot have grubstaked they cannot have grubstaked	I cannot have been grubstaking you cannot have been grubstaking he cannot have been grubstaking we cannot have been grubstaking you cannot have been grubstaking they cannot have been grubstaking

Interrogative form

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

Interro-negative form

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