English verb conjugation
CAN CONCERTISE

Regular verb: concertise - concertised - concertised

Affirmation

Simple form	V-ing form
I can concertise you can concertise he can concertise we can concertise you can concertise they can concertise	I can be concertising you can be concertising he can be concertising we can be concertising you can be concertising they can be concertising
Perfect	V-ing perfect
I can have concertised you can have concertised he can have concertised we can have concertised you can have concertised they can have concertised	I can have been concertising you can have been concertising he can have been concertising we can have been concertising you can have been concertising they can have been concertising

Negation

Simple form	V-ing form
I can't concertise you can't concertise he can't concertise we can't concertise you can't concertise they can't concertise	I can't be concertising you can't be concertising he can't be concertising we can't be concertising you can't be concertising they can't be concertising
Perfect	V-ing perfect
I can't have concertised you can't have concertised he can't have concertised we can't have concertised you can't have concertised they can't have concertised	I can't have been concertising you can't have been concertising he can't have been concertising we can't have been concertising you can't have been concertising they can't have been concertising

Interrogative form

Simple form	V-ing form
can I concertise? can you concertise? can he concertise? can we concertise? can you concertise? can they concertise?	can I be concertising? can you be concertising? can he be concertising? can we be concertising? can you be concertising? can they be concertising?
Perfect	V-ing perfect
can I have concertised? can you have concertised? can he have concertised? can we have concertised? can you have concertised? can they have concertised?	can I have been concertising? can you have been concertising? can he have been concertising? can we have been concertising? can you have been concertising? can they have been concertising?

Interro-negative form

Simple form	V-ing form
can't I concertise? can't you concertise? can't he concertise? can't we concertise? can't you concertise? can't they concertise?	can't I be concertising? can't you be concertising? can't he be concertising? can't we be concertising? can't you be concertising? can't they be concertising?
Perfect	V-ing perfect
can't I have concertised? can't you have concertised? can't he have concertised? can't we have concertised? can't you have concertised? can't they have concertised?	can't I have been concertising? can't you have been concertising? can't he have been concertising? can't we have been concertising? can't you have been concertising? can't they have been concertising?