English verb conjugation
COULD FACTORISE

Regular verb: factorise - factorised - factorised

Affirmation

Simple form	V-ing form
I could factorise you could factorise he could factorise we could factorise you could factorise they could factorise	I could be factorising you could be factorising he could be factorising we could be factorising you could be factorising they could be factorising
Perfect	V-ing perfect
I could have factorised you could have factorised he could have factorised we could have factorised you could have factorised they could have factorised	I could have been factorising you could have been factorising he could have been factorising we could have been factorising you could have been factorising they could have been factorising

Negation

Simple form	V-ing form
I couldn't factorise you couldn't factorise he couldn't factorise we couldn't factorise you couldn't factorise they couldn't factorise	I couldn't be factorising you couldn't be factorising he couldn't be factorising we couldn't be factorising you couldn't be factorising they couldn't be factorising
Perfect	V-ing perfect
I couldn't have factorised you couldn't have factorised he couldn't have factorised we couldn't have factorised you couldn't have factorised they couldn't have factorised	I couldn't have been factorising you couldn't have been factorising he couldn't have been factorising we couldn't have been factorising you couldn't have been factorising they couldn't have been factorising

Interrogative form

Simple form	V-ing form
could I factorise? could you factorise? could he factorise? could we factorise? could you factorise? could they factorise?	could I be factorising? could you be factorising? could he be factorising? could we be factorising? could you be factorising? could they be factorising?
Perfect	V-ing perfect
could I have factorised? could you have factorised? could he have factorised? could we have factorised? could you have factorised? could they have factorised?	could I have been factorising? could you have been factorising? could he have been factorising? could we have been factorising? could you have been factorising? could they have been factorising?

Interro-negative form

Simple form	V-ing form
couldn't I factorise? couldn't you factorise? couldn't he factorise? couldn't we factorise? couldn't you factorise? couldn't they factorise?	couldn't I be factorising? couldn't you be factorising? couldn't he be factorising? couldn't we be factorising? couldn't you be factorising? couldn't they be factorising?
Perfect	V-ing perfect
couldn't I have factorised? couldn't you have factorised? couldn't he have factorised? couldn't we have factorised? couldn't you have factorised? couldn't they have factorised?	couldn't I have been factorising? couldn't you have been factorising? couldn't he have been factorising? couldn't we have been factorising? couldn't you have been factorising? couldn't they have been factorising?