I must devil you must devil he must devil we must devil you must devil they must devil
V-ing form
I must be devilling you must be devilling he must be devilling we must be devilling you must be devilling they must be devilling
Perfect
I must have devilled you must have devilled he 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 he must have been devilling we must have been devilling you must have been devilling they must have been devilling
Negation
Simple form
I must not devil you must not devil he must not devil we must not devil you must not devil they must not devil
V-ing form
I must not be devilling you must not be devilling he must not be devilling we must not be devilling you must not be devilling they must not be devilling
Perfect
I must not have devilled you must not have devilled he must not have devilled we must not have devilled you must not have devilled they must not have devilled
V-ing perfect
I must not have been devilling you must not have been devilling he must not have been devilling we must not have been devilling you must not have been devilling they must not have been devilling
Interrogative form
Simple form
must I devil? must you devil? must he devil? must we devil? must you devil? must they devil?
V-ing form
must I be devilling? must you be devilling? must he be devilling? must we be devilling? must you be devilling? must they be devilling?
Perfect
must I have devilled? must you have devilled? must he 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 he have been devilling? must we have been devilling? must you have been devilling? must they have been devilling?
Interro-negative form
Simple form
must I not devil? must you not devil? must he not devil? must we not devil? must you not devil? must they not devil?
V-ing form
must I not be devilling? must you not be devilling? must he not be devilling? must we not be devilling? must you not be devilling? must they not be devilling?
Perfect
must I not have devilled? must you not have devilled? must he not have devilled? must we not have devilled? must you not have devilled? must they not have devilled?
V-ing perfect
must I not have been devilling? must you not have been devilling? must he not have been devilling? must we not have been devilling? must you not have been devilling? must they not have been devilling?