English verb conjugation
COULD SPECIALISE

Regular verb: specialise - specialised - specialised

Affirmation

Simple form	V-ing form
I could specialise you could specialise he could specialise we could specialise you could specialise they could specialise	I could be specialising you could be specialising he could be specialising we could be specialising you could be specialising they could be specialising
Perfect	V-ing perfect
I could have specialised you could have specialised he could have specialised we could have specialised you could have specialised they could have specialised	I could have been specialising you could have been specialising he could have been specialising we could have been specialising you could have been specialising they could have been specialising

Negation

Simple form	V-ing form
I couldn't specialise you couldn't specialise he couldn't specialise we couldn't specialise you couldn't specialise they couldn't specialise	I couldn't be specialising you couldn't be specialising he couldn't be specialising we couldn't be specialising you couldn't be specialising they couldn't be specialising
Perfect	V-ing perfect
I couldn't have specialised you couldn't have specialised he couldn't have specialised we couldn't have specialised you couldn't have specialised they couldn't have specialised	I couldn't have been specialising you couldn't have been specialising he couldn't have been specialising we couldn't have been specialising you couldn't have been specialising they couldn't have been specialising

Interrogative form

Simple form	V-ing form
could I specialise? could you specialise? could he specialise? could we specialise? could you specialise? could they specialise?	could I be specialising? could you be specialising? could he be specialising? could we be specialising? could you be specialising? could they be specialising?
Perfect	V-ing perfect
could I have specialised? could you have specialised? could he have specialised? could we have specialised? could you have specialised? could they have specialised?	could I have been specialising? could you have been specialising? could he have been specialising? could we have been specialising? could you have been specialising? could they have been specialising?

Interro-negative form

Simple form	V-ing form
couldn't I specialise? couldn't you specialise? couldn't he specialise? couldn't we specialise? couldn't you specialise? couldn't they specialise?	couldn't I be specialising? couldn't you be specialising? couldn't he be specialising? couldn't we be specialising? couldn't you be specialising? couldn't they be specialising?
Perfect	V-ing perfect
couldn't I have specialised? couldn't you have specialised? couldn't he have specialised? couldn't we have specialised? couldn't you have specialised? couldn't they have specialised?	couldn't I have been specialising? couldn't you have been specialising? couldn't he have been specialising? couldn't we have been specialising? couldn't you have been specialising? couldn't they have been specialising?