English verb conjugation
CAN IMPROVISE

Regular verb: improvise - improvised - improvised

Affirmation

Simple form	V-ing form
I can improvise you can improvise he can improvise we can improvise you can improvise they can improvise	I can be improvising you can be improvising he can be improvising we can be improvising you can be improvising they can be improvising
Perfect	V-ing perfect
I can have improvised you can have improvised he can have improvised we can have improvised you can have improvised they can have improvised	I can have been improvising you can have been improvising he can have been improvising we can have been improvising you can have been improvising they can have been improvising

Negation

Simple form	V-ing form
I can't improvise you can't improvise he can't improvise we can't improvise you can't improvise they can't improvise	I can't be improvising you can't be improvising he can't be improvising we can't be improvising you can't be improvising they can't be improvising
Perfect	V-ing perfect
I can't have improvised you can't have improvised he can't have improvised we can't have improvised you can't have improvised they can't have improvised	I can't have been improvising you can't have been improvising he can't have been improvising we can't have been improvising you can't have been improvising they can't have been improvising

Interrogative form

Simple form	V-ing form
can I improvise? can you improvise? can he improvise? can we improvise? can you improvise? can they improvise?	can I be improvising? can you be improvising? can he be improvising? can we be improvising? can you be improvising? can they be improvising?
Perfect	V-ing perfect
can I have improvised? can you have improvised? can he have improvised? can we have improvised? can you have improvised? can they have improvised?	can I have been improvising? can you have been improvising? can he have been improvising? can we have been improvising? can you have been improvising? can they have been improvising?

Interro-negative form

Simple form	V-ing form
can't I improvise? can't you improvise? can't he improvise? can't we improvise? can't you improvise? can't they improvise?	can't I be improvising? can't you be improvising? can't he be improvising? can't we be improvising? can't you be improvising? can't they be improvising?
Perfect	V-ing perfect
can't I have improvised? can't you have improvised? can't he have improvised? can't we have improvised? can't you have improvised? can't they have improvised?	can't I have been improvising? can't you have been improvising? can't he have been improvising? can't we have been improvising? can't you have been improvising? can't they have been improvising?