English verb conjugation
COULD DEVOCALISE

Regular verb: devocalise - devocalised - devocalised

Affirmation

Simple form	V-ing form
I could devocalise you could devocalise she could devocalise we could devocalise you could devocalise they could devocalise	I could be devocalising you could be devocalising she could be devocalising we could be devocalising you could be devocalising they could be devocalising
Perfect	V-ing perfect
I could have devocalised you could have devocalised she could have devocalised we could have devocalised you could have devocalised they could have devocalised	I could have been devocalising you could have been devocalising she could have been devocalising we could have been devocalising you could have been devocalising they could have been devocalising

Negation

Simple form	V-ing form
I couldn't devocalise you couldn't devocalise she couldn't devocalise we couldn't devocalise you couldn't devocalise they couldn't devocalise	I couldn't be devocalising you couldn't be devocalising she couldn't be devocalising we couldn't be devocalising you couldn't be devocalising they couldn't be devocalising
Perfect	V-ing perfect
I couldn't have devocalised you couldn't have devocalised she couldn't have devocalised we couldn't have devocalised you couldn't have devocalised they couldn't have devocalised	I couldn't have been devocalising you couldn't have been devocalising she couldn't have been devocalising we couldn't have been devocalising you couldn't have been devocalising they couldn't have been devocalising

Interrogative form

Simple form	V-ing form
could I devocalise? could you devocalise? could she devocalise? could we devocalise? could you devocalise? could they devocalise?	could I be devocalising? could you be devocalising? could she be devocalising? could we be devocalising? could you be devocalising? could they be devocalising?
Perfect	V-ing perfect
could I have devocalised? could you have devocalised? could she have devocalised? could we have devocalised? could you have devocalised? could they have devocalised?	could I have been devocalising? could you have been devocalising? could she have been devocalising? could we have been devocalising? could you have been devocalising? could they have been devocalising?

Interro-negative form

Simple form	V-ing form
couldn't I devocalise? couldn't you devocalise? couldn't she devocalise? couldn't we devocalise? couldn't you devocalise? couldn't they devocalise?	couldn't I be devocalising? couldn't you be devocalising? couldn't she be devocalising? couldn't we be devocalising? couldn't you be devocalising? couldn't they be devocalising?
Perfect	V-ing perfect
couldn't I have devocalised? couldn't you have devocalised? couldn't she have devocalised? couldn't we have devocalised? couldn't you have devocalised? couldn't they have devocalised?	couldn't I have been devocalising? couldn't you have been devocalising? couldn't she have been devocalising? couldn't we have been devocalising? couldn't you have been devocalising? couldn't they have been devocalising?