English verb conjugation
MUST SWELL

Irregular verb: swell - swelled - swelled, swollen

Affirmation

Simple form	V-ing form
I must swell you must swell he must swell we must swell you must swell they must swell	I must be swelling you must be swelling he must be swelling we must be swelling you must be swelling they must be swelling
Perfect	V-ing perfect
I must have swelled, swollen you must have swelled, swollen he must have swelled, swollen we must have swelled, swollen you must have swelled, swollen they must have swelled, swollen	I must have been swelling you must have been swelling he must have been swelling we must have been swelling you must have been swelling they must have been swelling

Negation

Simple form	V-ing form
I must not swell you must not swell he must not swell we must not swell you must not swell they must not swell	I must not be swelling you must not be swelling he must not be swelling we must not be swelling you must not be swelling they must not be swelling
Perfect	V-ing perfect
I must not have swelled, swollen you must not have swelled, swollen he must not have swelled, swollen we must not have swelled, swollen you must not have swelled, swollen they must not have swelled, swollen	I must not have been swelling you must not have been swelling he must not have been swelling we must not have been swelling you must not have been swelling they must not have been swelling

Interrogative form

Simple form	V-ing form
must I swell? must you swell? must he swell? must we swell? must you swell? must they swell?	must I be swelling? must you be swelling? must he be swelling? must we be swelling? must you be swelling? must they be swelling?
Perfect	V-ing perfect
must I have swelled, swollen? must you have swelled, swollen? must he have swelled, swollen? must we have swelled, swollen? must you have swelled, swollen? must they have swelled, swollen?	must I have been swelling? must you have been swelling? must he have been swelling? must we have been swelling? must you have been swelling? must they have been swelling?

Interro-negative form

Simple form	V-ing form
must I not swell? must you not swell? must he not swell? must we not swell? must you not swell? must they not swell?	must I not be swelling? must you not be swelling? must he not be swelling? must we not be swelling? must you not be swelling? must they not be swelling?
Perfect	V-ing perfect
must I not have swelled, swollen? must you not have swelled, swollen? must he not have swelled, swollen? must we not have swelled, swollen? must you not have swelled, swollen? must they not have swelled, swollen?	must I not have been swelling? must you not have been swelling? must he not have been swelling? must we not have been swelling? must you not have been swelling? must they not have been swelling?