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