English verb conjugation
COULD ISOMERISE

Regular verb: isomerise - isomerised - isomerised

Affirmation

Simple form	V-ing form
I could isomerise you could isomerise he could isomerise we could isomerise you could isomerise they could isomerise	I could be isomerising you could be isomerising he 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 he 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 he 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 he 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 he 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 he 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 he 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 he isomerise? could we isomerise? could you isomerise? could they isomerise?	could I be isomerising? could you be isomerising? could he 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 he 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 he 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 he 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 he 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 he 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 he have been isomerising? couldn't we have been isomerising? couldn't you have been isomerising? couldn't they have been isomerising?