English verb conjugation
MUST CRYSTALLISE

Regular verb: crystallise - crystallised - crystallised

Affirmation

Simple form	V-ing form
I must crystallise you must crystallise she must crystallise we must crystallise you must crystallise they must crystallise	I must be crystallising you must be crystallising she must be crystallising we must be crystallising you must be crystallising they must be crystallising
Perfect	V-ing perfect
I must have crystallised you must have crystallised she must have crystallised we must have crystallised you must have crystallised they must have crystallised	I must have been crystallising you must have been crystallising she must have been crystallising we must have been crystallising you must have been crystallising they must have been crystallising

Negation

Simple form	V-ing form
I must not crystallise you must not crystallise she must not crystallise we must not crystallise you must not crystallise they must not crystallise	I must not be crystallising you must not be crystallising she must not be crystallising we must not be crystallising you must not be crystallising they must not be crystallising
Perfect	V-ing perfect
I must not have crystallised you must not have crystallised she must not have crystallised we must not have crystallised you must not have crystallised they must not have crystallised	I must not have been crystallising you must not have been crystallising she must not have been crystallising we must not have been crystallising you must not have been crystallising they must not have been crystallising

Interrogative form

Simple form	V-ing form
must I crystallise? must you crystallise? must she crystallise? must we crystallise? must you crystallise? must they crystallise?	must I be crystallising? must you be crystallising? must she be crystallising? must we be crystallising? must you be crystallising? must they be crystallising?
Perfect	V-ing perfect
must I have crystallised? must you have crystallised? must she have crystallised? must we have crystallised? must you have crystallised? must they have crystallised?	must I have been crystallising? must you have been crystallising? must she have been crystallising? must we have been crystallising? must you have been crystallising? must they have been crystallising?

Interro-negative form

Simple form	V-ing form
must I not crystallise? must you not crystallise? must she not crystallise? must we not crystallise? must you not crystallise? must they not crystallise?	must I not be crystallising? must you not be crystallising? must she not be crystallising? must we not be crystallising? must you not be crystallising? must they not be crystallising?
Perfect	V-ing perfect
must I not have crystallised? must you not have crystallised? must she not have crystallised? must we not have crystallised? must you not have crystallised? must they not have crystallised?	must I not have been crystallising? must you not have been crystallising? must she not have been crystallising? must we not have been crystallising? must you not have been crystallising? must they not have been crystallising?