English verb conjugation
COULD PRESTRESS

Regular verb: prestress - prestressed - prestressed

Affirmation

Simple form	V-ing form
I could prestress you could prestress she could prestress we could prestress you could prestress they could prestress	I could be prestressing you could be prestressing she could be prestressing we could be prestressing you could be prestressing they could be prestressing
Perfect	V-ing perfect
I could have prestressed you could have prestressed she could have prestressed we could have prestressed you could have prestressed they could have prestressed	I could have been prestressing you could have been prestressing she could have been prestressing we could have been prestressing you could have been prestressing they could have been prestressing

Negation

Simple form	V-ing form
I couldn't prestress you couldn't prestress she couldn't prestress we couldn't prestress you couldn't prestress they couldn't prestress	I couldn't be prestressing you couldn't be prestressing she couldn't be prestressing we couldn't be prestressing you couldn't be prestressing they couldn't be prestressing
Perfect	V-ing perfect
I couldn't have prestressed you couldn't have prestressed she couldn't have prestressed we couldn't have prestressed you couldn't have prestressed they couldn't have prestressed	I couldn't have been prestressing you couldn't have been prestressing she couldn't have been prestressing we couldn't have been prestressing you couldn't have been prestressing they couldn't have been prestressing

Interrogative form

Simple form	V-ing form
could I prestress? could you prestress? could she prestress? could we prestress? could you prestress? could they prestress?	could I be prestressing? could you be prestressing? could she be prestressing? could we be prestressing? could you be prestressing? could they be prestressing?
Perfect	V-ing perfect
could I have prestressed? could you have prestressed? could she have prestressed? could we have prestressed? could you have prestressed? could they have prestressed?	could I have been prestressing? could you have been prestressing? could she have been prestressing? could we have been prestressing? could you have been prestressing? could they have been prestressing?

Interro-negative form

Simple form	V-ing form
couldn't I prestress? couldn't you prestress? couldn't she prestress? couldn't we prestress? couldn't you prestress? couldn't they prestress?	couldn't I be prestressing? couldn't you be prestressing? couldn't she be prestressing? couldn't we be prestressing? couldn't you be prestressing? couldn't they be prestressing?
Perfect	V-ing perfect
couldn't I have prestressed? couldn't you have prestressed? couldn't she have prestressed? couldn't we have prestressed? couldn't you have prestressed? couldn't they have prestressed?	couldn't I have been prestressing? couldn't you have been prestressing? couldn't she have been prestressing? couldn't we have been prestressing? couldn't you have been prestressing? couldn't they have been prestressing?