English verb conjugation
COULD SYNCHRONISE

Regular verb: synchronise - synchronised - synchronised

Affirmation

Simple form	V-ing form
I could synchronise you could synchronise he could synchronise we could synchronise you could synchronise they could synchronise	I could be synchronising you could be synchronising he could be synchronising we could be synchronising you could be synchronising they could be synchronising
Perfect	V-ing perfect
I could have synchronised you could have synchronised he could have synchronised we could have synchronised you could have synchronised they could have synchronised	I could have been synchronising you could have been synchronising he could have been synchronising we could have been synchronising you could have been synchronising they could have been synchronising

Negation

Simple form	V-ing form
I could not synchronise you could not synchronise he could not synchronise we could not synchronise you could not synchronise they could not synchronise	I could not be synchronising you could not be synchronising he could not be synchronising we could not be synchronising you could not be synchronising they could not be synchronising
Perfect	V-ing perfect
I could not have synchronised you could not have synchronised he could not have synchronised we could not have synchronised you could not have synchronised they could not have synchronised	I could not have been synchronising you could not have been synchronising he could not have been synchronising we could not have been synchronising you could not have been synchronising they could not have been synchronising

Interrogative form

Simple form	V-ing form
could I synchronise? could you synchronise? could he synchronise? could we synchronise? could you synchronise? could they synchronise?	could I be synchronising? could you be synchronising? could he be synchronising? could we be synchronising? could you be synchronising? could they be synchronising?
Perfect	V-ing perfect
could I have synchronised? could you have synchronised? could he have synchronised? could we have synchronised? could you have synchronised? could they have synchronised?	could I have been synchronising? could you have been synchronising? could he have been synchronising? could we have been synchronising? could you have been synchronising? could they have been synchronising?

Interro-negative form

Simple form	V-ing form
could I not synchronise? could you not synchronise? could he not synchronise? could we not synchronise? could you not synchronise? could they not synchronise?	could I not be synchronising? could you not be synchronising? could he not be synchronising? could we not be synchronising? could you not be synchronising? could they not be synchronising?
Perfect	V-ing perfect
could I not have synchronised? could you not have synchronised? could he not have synchronised? could we not have synchronised? could you not have synchronised? could they not have synchronised?	could I not have been synchronising? could you not have been synchronising? could he not have been synchronising? could we not have been synchronising? could you not have been synchronising? could they not have been synchronising?