English verb conjugation
MUST SWAB

Regular verb: swab - swabed - swabed

Affirmation

Simple form	V-ing form
I must swab you must swab he must swab we must swab you must swab they must swab	I must be swabing you must be swabing he must be swabing we must be swabing you must be swabing they must be swabing
Perfect	V-ing perfect
I must have swabed you must have swabed he must have swabed we must have swabed you must have swabed they must have swabed	I must have been swabing you must have been swabing he must have been swabing we must have been swabing you must have been swabing they must have been swabing

Negation

Simple form	V-ing form
I must not swab you must not swab he must not swab we must not swab you must not swab they must not swab	I must not be swabing you must not be swabing he must not be swabing we must not be swabing you must not be swabing they must not be swabing
Perfect	V-ing perfect
I must not have swabed you must not have swabed he must not have swabed we must not have swabed you must not have swabed they must not have swabed	I must not have been swabing you must not have been swabing he must not have been swabing we must not have been swabing you must not have been swabing they must not have been swabing

Interrogative form

Simple form	V-ing form
must I swab? must you swab? must he swab? must we swab? must you swab? must they swab?	must I be swabing? must you be swabing? must he be swabing? must we be swabing? must you be swabing? must they be swabing?
Perfect	V-ing perfect
must I have swabed? must you have swabed? must he have swabed? must we have swabed? must you have swabed? must they have swabed?	must I have been swabing? must you have been swabing? must he have been swabing? must we have been swabing? must you have been swabing? must they have been swabing?

Interro-negative form

Simple form	V-ing form
must I not swab? must you not swab? must he not swab? must we not swab? must you not swab? must they not swab?	must I not be swabing? must you not be swabing? must he not be swabing? must we not be swabing? must you not be swabing? must they not be swabing?
Perfect	V-ing perfect
must I not have swabed? must you not have swabed? must he not have swabed? must we not have swabed? must you not have swabed? must they not have swabed?	must I not have been swabing? must you not have been swabing? must he not have been swabing? must we not have been swabing? must you not have been swabing? must they not have been swabing?