English verb conjugation
COULD SYMMETRISE

Regular verb: symmetrise - symmetrised - symmetrised

Affirmation

Simple form	V-ing form
I could symmetrise you could symmetrise he could symmetrise we could symmetrise you could symmetrise they could symmetrise	I could be symmetrising you could be symmetrising he could be symmetrising we could be symmetrising you could be symmetrising they could be symmetrising
Perfect	V-ing perfect
I could have symmetrised you could have symmetrised he could have symmetrised we could have symmetrised you could have symmetrised they could have symmetrised	I could have been symmetrising you could have been symmetrising he could have been symmetrising we could have been symmetrising you could have been symmetrising they could have been symmetrising

Negation

Simple form	V-ing form
I could not symmetrise you could not symmetrise he could not symmetrise we could not symmetrise you could not symmetrise they could not symmetrise	I could not be symmetrising you could not be symmetrising he could not be symmetrising we could not be symmetrising you could not be symmetrising they could not be symmetrising
Perfect	V-ing perfect
I could not have symmetrised you could not have symmetrised he could not have symmetrised we could not have symmetrised you could not have symmetrised they could not have symmetrised	I could not have been symmetrising you could not have been symmetrising he could not have been symmetrising we could not have been symmetrising you could not have been symmetrising they could not have been symmetrising

Interrogative form

Simple form	V-ing form
could I symmetrise? could you symmetrise? could he symmetrise? could we symmetrise? could you symmetrise? could they symmetrise?	could I be symmetrising? could you be symmetrising? could he be symmetrising? could we be symmetrising? could you be symmetrising? could they be symmetrising?
Perfect	V-ing perfect
could I have symmetrised? could you have symmetrised? could he have symmetrised? could we have symmetrised? could you have symmetrised? could they have symmetrised?	could I have been symmetrising? could you have been symmetrising? could he have been symmetrising? could we have been symmetrising? could you have been symmetrising? could they have been symmetrising?

Interro-negative form

Simple form	V-ing form
could I not symmetrise? could you not symmetrise? could he not symmetrise? could we not symmetrise? could you not symmetrise? could they not symmetrise?	could I not be symmetrising? could you not be symmetrising? could he not be symmetrising? could we not be symmetrising? could you not be symmetrising? could they not be symmetrising?
Perfect	V-ing perfect
could I not have symmetrised? could you not have symmetrised? could he not have symmetrised? could we not have symmetrised? could you not have symmetrised? could they not have symmetrised?	could I not have been symmetrising? could you not have been symmetrising? could he not have been symmetrising? could we not have been symmetrising? could you not have been symmetrising? could they not have been symmetrising?