English verb conjugation
CAN CRYSTALLISE

Regular verb: crystallise - crystallised - crystallised

Affirmation

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

Negation

Simple form	V-ing form
I cannot crystallise you cannot crystallise he cannot crystallise we cannot crystallise you cannot crystallise they cannot crystallise	I cannot be crystallising you cannot be crystallising he cannot be crystallising we cannot be crystallising you cannot be crystallising they cannot be crystallising
Perfect	V-ing perfect
I cannot have crystallised you cannot have crystallised he cannot have crystallised we cannot have crystallised you cannot have crystallised they cannot have crystallised	I cannot have been crystallising you cannot have been crystallising he cannot have been crystallising we cannot have been crystallising you cannot have been crystallising they cannot have been crystallising

Interrogative form

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

Interro-negative form

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