English verb conjugation
MUST TETHER

Regular verb: tether - tethered - tethered

Affirmation

Simple form	V-ing form
I must tether you must tether he must tether we must tether you must tether they must tether	I must be tethering you must be tethering he must be tethering we must be tethering you must be tethering they must be tethering
Perfect	V-ing perfect
I must have tethered you must have tethered he must have tethered we must have tethered you must have tethered they must have tethered	I must have been tethering you must have been tethering he must have been tethering we must have been tethering you must have been tethering they must have been tethering

Negation

Simple form	V-ing form
I mustn't tether you mustn't tether he mustn't tether we mustn't tether you mustn't tether they mustn't tether	I mustn't be tethering you mustn't be tethering he mustn't be tethering we mustn't be tethering you mustn't be tethering they mustn't be tethering
Perfect	V-ing perfect
I mustn't have tethered you mustn't have tethered he mustn't have tethered we mustn't have tethered you mustn't have tethered they mustn't have tethered	I mustn't have been tethering you mustn't have been tethering he mustn't have been tethering we mustn't have been tethering you mustn't have been tethering they mustn't have been tethering

Interrogative form

Simple form	V-ing form
must I tether? must you tether? must he tether? must we tether? must you tether? must they tether?	must I be tethering? must you be tethering? must he be tethering? must we be tethering? must you be tethering? must they be tethering?
Perfect	V-ing perfect
must I have tethered? must you have tethered? must he have tethered? must we have tethered? must you have tethered? must they have tethered?	must I have been tethering? must you have been tethering? must he have been tethering? must we have been tethering? must you have been tethering? must they have been tethering?

Interro-negative form

Simple form	V-ing form
mustn't I tether? mustn't you tether? mustn't he tether? mustn't we tether? mustn't you tether? mustn't they tether?	mustn't I be tethering? mustn't you be tethering? mustn't he be tethering? mustn't we be tethering? mustn't you be tethering? mustn't they be tethering?
Perfect	V-ing perfect
mustn't I have tethered? mustn't you have tethered? mustn't he have tethered? mustn't we have tethered? mustn't you have tethered? mustn't they have tethered?	mustn't I have been tethering? mustn't you have been tethering? mustn't he have been tethering? mustn't we have been tethering? mustn't you have been tethering? mustn't they have been tethering?