I must attaint you must attaint he must attaint we must attaint you must attaint they must attaint
V-ing form
I must be attainting you must be attainting he must be attainting we must be attainting you must be attainting they must be attainting
Perfect
I must have attainted you must have attainted he must have attainted we must have attainted you must have attainted they must have attainted
V-ing perfect
I must have been attainting you must have been attainting he must have been attainting we must have been attainting you must have been attainting they must have been attainting
Negation
Simple form
I must not attaint you must not attaint he must not attaint we must not attaint you must not attaint they must not attaint
V-ing form
I must not be attainting you must not be attainting he must not be attainting we must not be attainting you must not be attainting they must not be attainting
Perfect
I must not have attainted you must not have attainted he must not have attainted we must not have attainted you must not have attainted they must not have attainted
V-ing perfect
I must not have been attainting you must not have been attainting he must not have been attainting we must not have been attainting you must not have been attainting they must not have been attainting
Interrogative form
Simple form
must I attaint? must you attaint? must he attaint? must we attaint? must you attaint? must they attaint?
V-ing form
must I be attainting? must you be attainting? must he be attainting? must we be attainting? must you be attainting? must they be attainting?
Perfect
must I have attainted? must you have attainted? must he have attainted? must we have attainted? must you have attainted? must they have attainted?
V-ing perfect
must I have been attainting? must you have been attainting? must he have been attainting? must we have been attainting? must you have been attainting? must they have been attainting?
Interro-negative form
Simple form
must I not attaint? must you not attaint? must he not attaint? must we not attaint? must you not attaint? must they not attaint?
V-ing form
must I not be attainting? must you not be attainting? must he not be attainting? must we not be attainting? must you not be attainting? must they not be attainting?
Perfect
must I not have attainted? must you not have attainted? must he not have attainted? must we not have attainted? must you not have attainted? must they not have attainted?
V-ing perfect
must I not have been attainting? must you not have been attainting? must he not have been attainting? must we not have been attainting? must you not have been attainting? must they not have been attainting?