English verb conjugation
COULD THEORISE

Regular verb: theorise - theorised - theorised

Affirmation

Simple form	V-ing form
I could theorise you could theorise she could theorise we could theorise you could theorise they could theorise	I could be theorising you could be theorising she could be theorising we could be theorising you could be theorising they could be theorising
Perfect	V-ing perfect
I could have theorised you could have theorised she could have theorised we could have theorised you could have theorised they could have theorised	I could have been theorising you could have been theorising she could have been theorising we could have been theorising you could have been theorising they could have been theorising

Negation

Simple form	V-ing form
I could not theorise you could not theorise she could not theorise we could not theorise you could not theorise they could not theorise	I could not be theorising you could not be theorising she could not be theorising we could not be theorising you could not be theorising they could not be theorising
Perfect	V-ing perfect
I could not have theorised you could not have theorised she could not have theorised we could not have theorised you could not have theorised they could not have theorised	I could not have been theorising you could not have been theorising she could not have been theorising we could not have been theorising you could not have been theorising they could not have been theorising

Interrogative form

Simple form	V-ing form
could I theorise? could you theorise? could she theorise? could we theorise? could you theorise? could they theorise?	could I be theorising? could you be theorising? could she be theorising? could we be theorising? could you be theorising? could they be theorising?
Perfect	V-ing perfect
could I have theorised? could you have theorised? could she have theorised? could we have theorised? could you have theorised? could they have theorised?	could I have been theorising? could you have been theorising? could she have been theorising? could we have been theorising? could you have been theorising? could they have been theorising?

Interro-negative form

Simple form	V-ing form
could I not theorise? could you not theorise? could she not theorise? could we not theorise? could you not theorise? could they not theorise?	could I not be theorising? could you not be theorising? could she not be theorising? could we not be theorising? could you not be theorising? could they not be theorising?
Perfect	V-ing perfect
could I not have theorised? could you not have theorised? could she not have theorised? could we not have theorised? could you not have theorised? could they not have theorised?	could I not have been theorising? could you not have been theorising? could she not have been theorising? could we not have been theorising? could you not have been theorising? could they not have been theorising?