English verb conjugation
COULD DEMAGNETISE

Regular verb: demagnetise - demagnetised - demagnetised

Affirmation

Simple form	V-ing form
I could demagnetise you could demagnetise he could demagnetise we could demagnetise you could demagnetise they could demagnetise	I could be demagnetising you could be demagnetising he could be demagnetising we could be demagnetising you could be demagnetising they could be demagnetising
Perfect	V-ing perfect
I could have demagnetised you could have demagnetised he could have demagnetised we could have demagnetised you could have demagnetised they could have demagnetised	I could have been demagnetising you could have been demagnetising he could have been demagnetising we could have been demagnetising you could have been demagnetising they could have been demagnetising

Negation

Simple form	V-ing form
I couldn't demagnetise you couldn't demagnetise he couldn't demagnetise we couldn't demagnetise you couldn't demagnetise they couldn't demagnetise	I couldn't be demagnetising you couldn't be demagnetising he couldn't be demagnetising we couldn't be demagnetising you couldn't be demagnetising they couldn't be demagnetising
Perfect	V-ing perfect
I couldn't have demagnetised you couldn't have demagnetised he couldn't have demagnetised we couldn't have demagnetised you couldn't have demagnetised they couldn't have demagnetised	I couldn't have been demagnetising you couldn't have been demagnetising he couldn't have been demagnetising we couldn't have been demagnetising you couldn't have been demagnetising they couldn't have been demagnetising

Interrogative form

Simple form	V-ing form
could I demagnetise? could you demagnetise? could he demagnetise? could we demagnetise? could you demagnetise? could they demagnetise?	could I be demagnetising? could you be demagnetising? could he be demagnetising? could we be demagnetising? could you be demagnetising? could they be demagnetising?
Perfect	V-ing perfect
could I have demagnetised? could you have demagnetised? could he have demagnetised? could we have demagnetised? could you have demagnetised? could they have demagnetised?	could I have been demagnetising? could you have been demagnetising? could he have been demagnetising? could we have been demagnetising? could you have been demagnetising? could they have been demagnetising?

Interro-negative form

Simple form	V-ing form
couldn't I demagnetise? couldn't you demagnetise? couldn't he demagnetise? couldn't we demagnetise? couldn't you demagnetise? couldn't they demagnetise?	couldn't I be demagnetising? couldn't you be demagnetising? couldn't he be demagnetising? couldn't we be demagnetising? couldn't you be demagnetising? couldn't they be demagnetising?
Perfect	V-ing perfect
couldn't I have demagnetised? couldn't you have demagnetised? couldn't he have demagnetised? couldn't we have demagnetised? couldn't you have demagnetised? couldn't they have demagnetised?	couldn't I have been demagnetising? couldn't you have been demagnetising? couldn't he have been demagnetising? couldn't we have been demagnetising? couldn't you have been demagnetising? couldn't they have been demagnetising?