English verb conjugation
MUST CATCH

Irregular verb: catch - caught - caught

Affirmation

Simple form	V-ing form
I must catch you must catch she must catch we must catch you must catch they must catch	I must be catching you must be catching she must be catching we must be catching you must be catching they must be catching
Perfect	V-ing perfect
I must have caught you must have caught she must have caught we must have caught you must have caught they must have caught	I must have been catching you must have been catching she must have been catching we must have been catching you must have been catching they must have been catching

Negation

Simple form	V-ing form
I must not catch you must not catch she must not catch we must not catch you must not catch they must not catch	I must not be catching you must not be catching she must not be catching we must not be catching you must not be catching they must not be catching
Perfect	V-ing perfect
I must not have caught you must not have caught she must not have caught we must not have caught you must not have caught they must not have caught	I must not have been catching you must not have been catching she must not have been catching we must not have been catching you must not have been catching they must not have been catching

Interrogative form

Simple form	V-ing form
must I catch? must you catch? must she catch? must we catch? must you catch? must they catch?	must I be catching? must you be catching? must she be catching? must we be catching? must you be catching? must they be catching?
Perfect	V-ing perfect
must I have caught? must you have caught? must she have caught? must we have caught? must you have caught? must they have caught?	must I have been catching? must you have been catching? must she have been catching? must we have been catching? must you have been catching? must they have been catching?

Interro-negative form

Simple form	V-ing form
must I not catch? must you not catch? must she not catch? must we not catch? must you not catch? must they not catch?	must I not be catching? must you not be catching? must she not be catching? must we not be catching? must you not be catching? must they not be catching?
Perfect	V-ing perfect
must I not have caught? must you not have caught? must she not have caught? must we not have caught? must you not have caught? must they not have caught?	must I not have been catching? must you not have been catching? must she not have been catching? must we not have been catching? must you not have been catching? must they not have been catching?