can improvise
Regular verb: improvise - improvised- improvised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
I cannot improvise
you cannot improvise
he cannot improvise
we cannot improvise
you cannot improvise
they cannot improvise 	I cannot be improvising
you cannot be improvising
he cannot be improvising
we cannot be improvising
you cannot be improvising
they cannot be improvising	I cannot have improvised
you cannot have improvised
he cannot have improvised
we cannot have improvised
you cannot have improvised
they cannot have improvised	I cannot have been improvising
you cannot have been improvising
he cannot have been improvising
we cannot have been improvising
you cannot have been improvising
they cannot have been improvising	

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