English verb conjugation
MUST EAT

Irregular verb: eat - ate - eaten

Affirmation

Simple form	V-ing form
I must eat you must eat he must eat we must eat you must eat they must eat	I must be eating you must be eating he must be eating we must be eating you must be eating they must be eating
Perfect	V-ing perfect
I must have eaten you must have eaten he must have eaten we must have eaten you must have eaten they must have eaten	I must have been eating you must have been eating he must have been eating we must have been eating you must have been eating they must have been eating

Negation

Simple form	V-ing form
I must not eat you must not eat he must not eat we must not eat you must not eat they must not eat	I must not be eating you must not be eating he must not be eating we must not be eating you must not be eating they must not be eating
Perfect	V-ing perfect
I must not have eaten you must not have eaten he must not have eaten we must not have eaten you must not have eaten they must not have eaten	I must not have been eating you must not have been eating he must not have been eating we must not have been eating you must not have been eating they must not have been eating

Interrogative form

Simple form	V-ing form
must I eat? must you eat? must he eat? must we eat? must you eat? must they eat?	must I be eating? must you be eating? must he be eating? must we be eating? must you be eating? must they be eating?
Perfect	V-ing perfect
must I have eaten? must you have eaten? must he have eaten? must we have eaten? must you have eaten? must they have eaten?	must I have been eating? must you have been eating? must he have been eating? must we have been eating? must you have been eating? must they have been eating?

Interro-negative form

Simple form	V-ing form
must I not eat? must you not eat? must he not eat? must we not eat? must you not eat? must they not eat?	must I not be eating? must you not be eating? must he not be eating? must we not be eating? must you not be eating? must they not be eating?
Perfect	V-ing perfect
must I not have eaten? must you not have eaten? must he not have eaten? must we not have eaten? must you not have eaten? must they not have eaten?	must I not have been eating? must you not have been eating? must he not have been eating? must we not have been eating? must you not have been eating? must they not have been eating?