English verb conjugation
COULD ISOMERISE

Regular verb: isomerise - isomerised - isomerised

Affirmation

Simple form	V-ing form
I could isomerise you could isomerise she could isomerise we could isomerise you could isomerise they could isomerise	I could be isomerising you could be isomerising she could be isomerising we could be isomerising you could be isomerising they could be isomerising
Perfect	V-ing perfect
I could have isomerised you could have isomerised she could have isomerised we could have isomerised you could have isomerised they could have isomerised	I could have been isomerising you could have been isomerising she could have been isomerising we could have been isomerising you could have been isomerising they could have been isomerising

Negation

Simple form	V-ing form
I couldn't isomerise you couldn't isomerise she couldn't isomerise we couldn't isomerise you couldn't isomerise they couldn't isomerise	I couldn't be isomerising you couldn't be isomerising she couldn't be isomerising we couldn't be isomerising you couldn't be isomerising they couldn't be isomerising
Perfect	V-ing perfect
I couldn't have isomerised you couldn't have isomerised she couldn't have isomerised we couldn't have isomerised you couldn't have isomerised they couldn't have isomerised	I couldn't have been isomerising you couldn't have been isomerising she couldn't have been isomerising we couldn't have been isomerising you couldn't have been isomerising they couldn't have been isomerising

Interrogative form

Simple form	V-ing form
could I isomerise? could you isomerise? could she isomerise? could we isomerise? could you isomerise? could they isomerise?	could I be isomerising? could you be isomerising? could she be isomerising? could we be isomerising? could you be isomerising? could they be isomerising?
Perfect	V-ing perfect
could I have isomerised? could you have isomerised? could she have isomerised? could we have isomerised? could you have isomerised? could they have isomerised?	could I have been isomerising? could you have been isomerising? could she have been isomerising? could we have been isomerising? could you have been isomerising? could they have been isomerising?

Interro-negative form

Simple form	V-ing form
couldn't I isomerise? couldn't you isomerise? couldn't she isomerise? couldn't we isomerise? couldn't you isomerise? couldn't they isomerise?	couldn't I be isomerising? couldn't you be isomerising? couldn't she be isomerising? couldn't we be isomerising? couldn't you be isomerising? couldn't they be isomerising?
Perfect	V-ing perfect
couldn't I have isomerised? couldn't you have isomerised? couldn't she have isomerised? couldn't we have isomerised? couldn't you have isomerised? couldn't they have isomerised?	couldn't I have been isomerising? couldn't you have been isomerising? couldn't she have been isomerising? couldn't we have been isomerising? couldn't you have been isomerising? couldn't they have been isomerising?