English verb conjugation
COULD CONCRETISE

Regular verb: concretise - concretised - concretised

Affirmation

Simple form	V-ing form
I could concretise you could concretise she could concretise we could concretise you could concretise they could concretise	I could be concretising you could be concretising she could be concretising we could be concretising you could be concretising they could be concretising
Perfect	V-ing perfect
I could have concretised you could have concretised she could have concretised we could have concretised you could have concretised they could have concretised	I could have been concretising you could have been concretising she could have been concretising we could have been concretising you could have been concretising they could have been concretising

Negation

Simple form	V-ing form
I couldn't concretise you couldn't concretise she couldn't concretise we couldn't concretise you couldn't concretise they couldn't concretise	I couldn't be concretising you couldn't be concretising she couldn't be concretising we couldn't be concretising you couldn't be concretising they couldn't be concretising
Perfect	V-ing perfect
I couldn't have concretised you couldn't have concretised she couldn't have concretised we couldn't have concretised you couldn't have concretised they couldn't have concretised	I couldn't have been concretising you couldn't have been concretising she couldn't have been concretising we couldn't have been concretising you couldn't have been concretising they couldn't have been concretising

Interrogative form

Simple form	V-ing form
could I concretise? could you concretise? could she concretise? could we concretise? could you concretise? could they concretise?	could I be concretising? could you be concretising? could she be concretising? could we be concretising? could you be concretising? could they be concretising?
Perfect	V-ing perfect
could I have concretised? could you have concretised? could she have concretised? could we have concretised? could you have concretised? could they have concretised?	could I have been concretising? could you have been concretising? could she have been concretising? could we have been concretising? could you have been concretising? could they have been concretising?

Interro-negative form

Simple form	V-ing form
couldn't I concretise? couldn't you concretise? couldn't she concretise? couldn't we concretise? couldn't you concretise? couldn't they concretise?	couldn't I be concretising? couldn't you be concretising? couldn't she be concretising? couldn't we be concretising? couldn't you be concretising? couldn't they be concretising?
Perfect	V-ing perfect
couldn't I have concretised? couldn't you have concretised? couldn't she have concretised? couldn't we have concretised? couldn't you have concretised? couldn't they have concretised?	couldn't I have been concretising? couldn't you have been concretising? couldn't she have been concretising? couldn't we have been concretising? couldn't you have been concretising? couldn't they have been concretising?