English verb conjugation
CAN REGRESS

Regular verb: regress - regressed - regressed

Affirmation

Simple form	V-ing form
I can regress you can regress he can regress we can regress you can regress they can regress	I can be regressing you can be regressing he can be regressing we can be regressing you can be regressing they can be regressing
Perfect	V-ing perfect
I can have regressed you can have regressed he can have regressed we can have regressed you can have regressed they can have regressed	I can have been regressing you can have been regressing he can have been regressing we can have been regressing you can have been regressing they can have been regressing

Negation

Simple form	V-ing form
I can't regress you can't regress he can't regress we can't regress you can't regress they can't regress	I can't be regressing you can't be regressing he can't be regressing we can't be regressing you can't be regressing they can't be regressing
Perfect	V-ing perfect
I can't have regressed you can't have regressed he can't have regressed we can't have regressed you can't have regressed they can't have regressed	I can't have been regressing you can't have been regressing he can't have been regressing we can't have been regressing you can't have been regressing they can't have been regressing

Interrogative form

Simple form	V-ing form
can I regress? can you regress? can he regress? can we regress? can you regress? can they regress?	can I be regressing? can you be regressing? can he be regressing? can we be regressing? can you be regressing? can they be regressing?
Perfect	V-ing perfect
can I have regressed? can you have regressed? can he have regressed? can we have regressed? can you have regressed? can they have regressed?	can I have been regressing? can you have been regressing? can he have been regressing? can we have been regressing? can you have been regressing? can they have been regressing?

Interro-negative form

Simple form	V-ing form
can't I regress? can't you regress? can't he regress? can't we regress? can't you regress? can't they regress?	can't I be regressing? can't you be regressing? can't he be regressing? can't we be regressing? can't you be regressing? can't they be regressing?
Perfect	V-ing perfect
can't I have regressed? can't you have regressed? can't he have regressed? can't we have regressed? can't you have regressed? can't they have regressed?	can't I have been regressing? can't you have been regressing? can't he have been regressing? can't we have been regressing? can't you have been regressing? can't they have been regressing?