English verb conjugation
MUST GLASS

Regular verb: glass - glassed - glassed

Affirmation

Simple form	V-ing form
I must glass you must glass he must glass we must glass you must glass they must glass	I must be glassing you must be glassing he must be glassing we must be glassing you must be glassing they must be glassing
Perfect	V-ing perfect
I must have glassed you must have glassed he must have glassed we must have glassed you must have glassed they must have glassed	I must have been glassing you must have been glassing he must have been glassing we must have been glassing you must have been glassing they must have been glassing

Negation

Simple form	V-ing form
I must not glass you must not glass he must not glass we must not glass you must not glass they must not glass	I must not be glassing you must not be glassing he must not be glassing we must not be glassing you must not be glassing they must not be glassing
Perfect	V-ing perfect
I must not have glassed you must not have glassed he must not have glassed we must not have glassed you must not have glassed they must not have glassed	I must not have been glassing you must not have been glassing he must not have been glassing we must not have been glassing you must not have been glassing they must not have been glassing

Interrogative form

Simple form	V-ing form
must I glass? must you glass? must he glass? must we glass? must you glass? must they glass?	must I be glassing? must you be glassing? must he be glassing? must we be glassing? must you be glassing? must they be glassing?
Perfect	V-ing perfect
must I have glassed? must you have glassed? must he have glassed? must we have glassed? must you have glassed? must they have glassed?	must I have been glassing? must you have been glassing? must he have been glassing? must we have been glassing? must you have been glassing? must they have been glassing?

Interro-negative form

Simple form	V-ing form
must I not glass? must you not glass? must he not glass? must we not glass? must you not glass? must they not glass?	must I not be glassing? must you not be glassing? must he not be glassing? must we not be glassing? must you not be glassing? must they not be glassing?
Perfect	V-ing perfect
must I not have glassed? must you not have glassed? must he not have glassed? must we not have glassed? must you not have glassed? must they not have glassed?	must I not have been glassing? must you not have been glassing? must he not have been glassing? must we not have been glassing? must you not have been glassing? must they not have been glassing?