I must obviate you must obviate she must obviate we must obviate you must obviate they must obviate
V-ing form
I must be obviating you must be obviating she must be obviating we must be obviating you must be obviating they must be obviating
Perfect
I must have obviated you must have obviated she must have obviated we must have obviated you must have obviated they must have obviated
V-ing perfect
I must have been obviating you must have been obviating she must have been obviating we must have been obviating you must have been obviating they must have been obviating
Negation
Simple form
I mustn't obviate you mustn't obviate she mustn't obviate we mustn't obviate you mustn't obviate they mustn't obviate
V-ing form
I mustn't be obviating you mustn't be obviating she mustn't be obviating we mustn't be obviating you mustn't be obviating they mustn't be obviating
Perfect
I mustn't have obviated you mustn't have obviated she mustn't have obviated we mustn't have obviated you mustn't have obviated they mustn't have obviated
V-ing perfect
I mustn't have been obviating you mustn't have been obviating she mustn't have been obviating we mustn't have been obviating you mustn't have been obviating they mustn't have been obviating
Interrogative form
Simple form
must I obviate? must you obviate? must she obviate? must we obviate? must you obviate? must they obviate?
V-ing form
must I be obviating? must you be obviating? must she be obviating? must we be obviating? must you be obviating? must they be obviating?
Perfect
must I have obviated? must you have obviated? must she have obviated? must we have obviated? must you have obviated? must they have obviated?
V-ing perfect
must I have been obviating? must you have been obviating? must she have been obviating? must we have been obviating? must you have been obviating? must they have been obviating?
Interro-negative form
Simple form
mustn't I obviate? mustn't you obviate? mustn't she obviate? mustn't we obviate? mustn't you obviate? mustn't they obviate?
V-ing form
mustn't I be obviating? mustn't you be obviating? mustn't she be obviating? mustn't we be obviating? mustn't you be obviating? mustn't they be obviating?
Perfect
mustn't I have obviated? mustn't you have obviated? mustn't she have obviated? mustn't we have obviated? mustn't you have obviated? mustn't they have obviated?
V-ing perfect
mustn't I have been obviating? mustn't you have been obviating? mustn't she have been obviating? mustn't we have been obviating? mustn't you have been obviating? mustn't they have been obviating?