I must grubstake you must grubstake she must grubstake we must grubstake you must grubstake they must grubstake
Forme en V-ing
I must be grubstaking you must be grubstaking she must be grubstaking we must be grubstaking you must be grubstaking they must be grubstaking
Perfect
I must have grubstaked you must have grubstaked she must have grubstaked we must have grubstaked you must have grubstaked they must have grubstaked
Perfect en V-ing
I must have been grubstaking you must have been grubstaking she must have been grubstaking we must have been grubstaking you must have been grubstaking they must have been grubstaking
Négation
Forme simple
I must not grubstake you must not grubstake she must not grubstake we must not grubstake you must not grubstake they must not grubstake
Forme en V-ing
I must not be grubstaking you must not be grubstaking she must not be grubstaking we must not be grubstaking you must not be grubstaking they must not be grubstaking
Perfect
I must not have grubstaked you must not have grubstaked she must not have grubstaked we must not have grubstaked you must not have grubstaked they must not have grubstaked
Perfect en V-ing
I must not have been grubstaking you must not have been grubstaking she must not have been grubstaking we must not have been grubstaking you must not have been grubstaking they must not have been grubstaking
Forme interrogative
Forme simple
must I grubstake? must you grubstake? must she grubstake? must we grubstake? must you grubstake? must they grubstake?
Forme en V-ing
must I be grubstaking? must you be grubstaking? must she be grubstaking? must we be grubstaking? must you be grubstaking? must they be grubstaking?
Perfect
must I have grubstaked? must you have grubstaked? must she have grubstaked? must we have grubstaked? must you have grubstaked? must they have grubstaked?
Perfect en V-ing
must I have been grubstaking? must you have been grubstaking? must she have been grubstaking? must we have been grubstaking? must you have been grubstaking? must they have been grubstaking?
Forme interro-négative
Forme simple
must I not grubstake? must you not grubstake? must she not grubstake? must we not grubstake? must you not grubstake? must they not grubstake?
Forme en V-ing
must I not be grubstaking? must you not be grubstaking? must she not be grubstaking? must we not be grubstaking? must you not be grubstaking? must they not be grubstaking?
Perfect
must I not have grubstaked? must you not have grubstaked? must she not have grubstaked? must we not have grubstaked? must you not have grubstaked? must they not have grubstaked?
Perfect en V-ing
must I not have been grubstaking? must you not have been grubstaking? must she not have been grubstaking? must we not have been grubstaking? must you not have been grubstaking? must they not have been grubstaking?