English verb conjugation
MUST GIGGLE

Regular verb: giggle - giggled - giggled

Affirmation

Simple form	V-ing form
I must giggle you must giggle he must giggle we must giggle you must giggle they must giggle	I must be giggling you must be giggling he must be giggling we must be giggling you must be giggling they must be giggling
Perfect	V-ing perfect
I must have giggled you must have giggled he must have giggled we must have giggled you must have giggled they must have giggled	I must have been giggling you must have been giggling he must have been giggling we must have been giggling you must have been giggling they must have been giggling

Negation

Simple form	V-ing form
I must not giggle you must not giggle he must not giggle we must not giggle you must not giggle they must not giggle	I must not be giggling you must not be giggling he must not be giggling we must not be giggling you must not be giggling they must not be giggling
Perfect	V-ing perfect
I must not have giggled you must not have giggled he must not have giggled we must not have giggled you must not have giggled they must not have giggled	I must not have been giggling you must not have been giggling he must not have been giggling we must not have been giggling you must not have been giggling they must not have been giggling

Interrogative form

Simple form	V-ing form
must I giggle? must you giggle? must he giggle? must we giggle? must you giggle? must they giggle?	must I be giggling? must you be giggling? must he be giggling? must we be giggling? must you be giggling? must they be giggling?
Perfect	V-ing perfect
must I have giggled? must you have giggled? must he have giggled? must we have giggled? must you have giggled? must they have giggled?	must I have been giggling? must you have been giggling? must he have been giggling? must we have been giggling? must you have been giggling? must they have been giggling?

Interro-negative form

Simple form	V-ing form
must I not giggle? must you not giggle? must he not giggle? must we not giggle? must you not giggle? must they not giggle?	must I not be giggling? must you not be giggling? must he not be giggling? must we not be giggling? must you not be giggling? must they not be giggling?
Perfect	V-ing perfect
must I not have giggled? must you not have giggled? must he not have giggled? must we not have giggled? must you not have giggled? must they not have giggled?	must I not have been giggling? must you not have been giggling? must he not have been giggling? must we not have been giggling? must you not have been giggling? must they not have been giggling?