English verb conjugation
COULD IMPROVISE

Regular verb: improvise - improvised - improvised

Affirmation

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

Negation

Simple form	V-ing form
I could not improvise you could not improvise she could not improvise we could not improvise you could not improvise they could not improvise	I could not be improvising you could not be improvising she could not be improvising we could not be improvising you could not be improvising they could not be improvising
Perfect	V-ing perfect
I could not have improvised you could not have improvised she could not have improvised we could not have improvised you could not have improvised they could not have improvised	I could not have been improvising you could not have been improvising she could not have been improvising we could not have been improvising you could not have been improvising they could not have been improvising

Interrogative form

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

Interro-negative form

Simple form	V-ing form
could I not improvise? could you not improvise? could she not improvise? could we not improvise? could you not improvise? could they not improvise?	could I not be improvising? could you not be improvising? could she not be improvising? could we not be improvising? could you not be improvising? could they not be improvising?
Perfect	V-ing perfect
could I not have improvised? could you not have improvised? could she not have improvised? could we not have improvised? could you not have improvised? could they not have improvised?	could I not have been improvising? could you not have been improvising? could she not have been improvising? could we not have been improvising? could you not have been improvising? could they not have been improvising?