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