English verb conjugation
COULD OPTIMISE

Regular verb: optimise - optimised - optimised

Affirmation

Simple form	V-ing form
I could optimise you could optimise she could optimise we could optimise you could optimise they could optimise	I could be optimising you could be optimising she could be optimising we could be optimising you could be optimising they could be optimising
Perfect	V-ing perfect
I could have optimised you could have optimised she could have optimised we could have optimised you could have optimised they could have optimised	I could have been optimising you could have been optimising she could have been optimising we could have been optimising you could have been optimising they could have been optimising

Negation

Simple form	V-ing form
I couldn't optimise you couldn't optimise she couldn't optimise we couldn't optimise you couldn't optimise they couldn't optimise	I couldn't be optimising you couldn't be optimising she couldn't be optimising we couldn't be optimising you couldn't be optimising they couldn't be optimising
Perfect	V-ing perfect
I couldn't have optimised you couldn't have optimised she couldn't have optimised we couldn't have optimised you couldn't have optimised they couldn't have optimised	I couldn't have been optimising you couldn't have been optimising she couldn't have been optimising we couldn't have been optimising you couldn't have been optimising they couldn't have been optimising

Interrogative form

Simple form	V-ing form
could I optimise? could you optimise? could she optimise? could we optimise? could you optimise? could they optimise?	could I be optimising? could you be optimising? could she be optimising? could we be optimising? could you be optimising? could they be optimising?
Perfect	V-ing perfect
could I have optimised? could you have optimised? could she have optimised? could we have optimised? could you have optimised? could they have optimised?	could I have been optimising? could you have been optimising? could she have been optimising? could we have been optimising? could you have been optimising? could they have been optimising?

Interro-negative form

Simple form	V-ing form
couldn't I optimise? couldn't you optimise? couldn't she optimise? couldn't we optimise? couldn't you optimise? couldn't they optimise?	couldn't I be optimising? couldn't you be optimising? couldn't she be optimising? couldn't we be optimising? couldn't you be optimising? couldn't they be optimising?
Perfect	V-ing perfect
couldn't I have optimised? couldn't you have optimised? couldn't she have optimised? couldn't we have optimised? couldn't you have optimised? couldn't they have optimised?	couldn't I have been optimising? couldn't you have been optimising? couldn't she have been optimising? couldn't we have been optimising? couldn't you have been optimising? couldn't they have been optimising?