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 mustn't swab you mustn't swab he mustn't swab we mustn't swab you mustn't swab they mustn't swab	I mustn't be swabing you mustn't be swabing he mustn't be swabing we mustn't be swabing you mustn't be swabing they mustn't be swabing
Perfect	V-ing perfect
I mustn't have swabed you mustn't have swabed he mustn't have swabed we mustn't have swabed you mustn't have swabed they mustn't have swabed	I mustn't have been swabing you mustn't have been swabing he mustn't have been swabing we mustn't have been swabing you mustn't have been swabing they mustn't 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
mustn't I swab? mustn't you swab? mustn't he swab? mustn't we swab? mustn't you swab? mustn't they swab?	mustn't I be swabing? mustn't you be swabing? mustn't he be swabing? mustn't we be swabing? mustn't you be swabing? mustn't they be swabing?
Perfect	V-ing perfect
mustn't I have swabed? mustn't you have swabed? mustn't he have swabed? mustn't we have swabed? mustn't you have swabed? mustn't they have swabed?	mustn't I have been swabing? mustn't you have been swabing? mustn't he have been swabing? mustn't we have been swabing? mustn't you have been swabing? mustn't they have been swabing?