English verb conjugation
MUST FOOL

Regular verb: fool - fooled - fooled

Affirmation

Simple form	V-ing form
I must fool you must fool she must fool we must fool you must fool they must fool	I must be fooling you must be fooling she must be fooling we must be fooling you must be fooling they must be fooling
Perfect	V-ing perfect
I must have fooled you must have fooled she must have fooled we must have fooled you must have fooled they must have fooled	I must have been fooling you must have been fooling she must have been fooling we must have been fooling you must have been fooling they must have been fooling

Negation

Simple form	V-ing form
I must not fool you must not fool she must not fool we must not fool you must not fool they must not fool	I must not be fooling you must not be fooling she must not be fooling we must not be fooling you must not be fooling they must not be fooling
Perfect	V-ing perfect
I must not have fooled you must not have fooled she must not have fooled we must not have fooled you must not have fooled they must not have fooled	I must not have been fooling you must not have been fooling she must not have been fooling we must not have been fooling you must not have been fooling they must not have been fooling

Interrogative form

Simple form	V-ing form
must I fool? must you fool? must she fool? must we fool? must you fool? must they fool?	must I be fooling? must you be fooling? must she be fooling? must we be fooling? must you be fooling? must they be fooling?
Perfect	V-ing perfect
must I have fooled? must you have fooled? must she have fooled? must we have fooled? must you have fooled? must they have fooled?	must I have been fooling? must you have been fooling? must she have been fooling? must we have been fooling? must you have been fooling? must they have been fooling?

Interro-negative form

Simple form	V-ing form
must I not fool? must you not fool? must she not fool? must we not fool? must you not fool? must they not fool?	must I not be fooling? must you not be fooling? must she not be fooling? must we not be fooling? must you not be fooling? must they not be fooling?
Perfect	V-ing perfect
must I not have fooled? must you not have fooled? must she not have fooled? must we not have fooled? must you not have fooled? must they not have fooled?	must I not have been fooling? must you not have been fooling? must she not have been fooling? must we not have been fooling? must you not have been fooling? must they not have been fooling?