I must assess you must assess he must assess we must assess you must assess they must assess
V-ing form
I must be assessing you must be assessing he must be assessing we must be assessing you must be assessing they must be assessing
Perfect
I must have assessed you must have assessed he must have assessed we must have assessed you must have assessed they must have assessed
V-ing perfect
I must have been assessing you must have been assessing he must have been assessing we must have been assessing you must have been assessing they must have been assessing
Negation
Simple form
I mustn't assess you mustn't assess he mustn't assess we mustn't assess you mustn't assess they mustn't assess
V-ing form
I mustn't be assessing you mustn't be assessing he mustn't be assessing we mustn't be assessing you mustn't be assessing they mustn't be assessing
Perfect
I mustn't have assessed you mustn't have assessed he mustn't have assessed we mustn't have assessed you mustn't have assessed they mustn't have assessed
V-ing perfect
I mustn't have been assessing you mustn't have been assessing he mustn't have been assessing we mustn't have been assessing you mustn't have been assessing they mustn't have been assessing
Interrogative form
Simple form
must I assess? must you assess? must he assess? must we assess? must you assess? must they assess?
V-ing form
must I be assessing? must you be assessing? must he be assessing? must we be assessing? must you be assessing? must they be assessing?
Perfect
must I have assessed? must you have assessed? must he have assessed? must we have assessed? must you have assessed? must they have assessed?
V-ing perfect
must I have been assessing? must you have been assessing? must he have been assessing? must we have been assessing? must you have been assessing? must they have been assessing?
Interro-negative form
Simple form
mustn't I assess? mustn't you assess? mustn't he assess? mustn't we assess? mustn't you assess? mustn't they assess?
V-ing form
mustn't I be assessing? mustn't you be assessing? mustn't he be assessing? mustn't we be assessing? mustn't you be assessing? mustn't they be assessing?
Perfect
mustn't I have assessed? mustn't you have assessed? mustn't he have assessed? mustn't we have assessed? mustn't you have assessed? mustn't they have assessed?
V-ing perfect
mustn't I have been assessing? mustn't you have been assessing? mustn't he have been assessing? mustn't we have been assessing? mustn't you have been assessing? mustn't they have been assessing?