Regular verb: regress - regressed - regressed
Simple form | V-ing form |
I must regress you must regress he must regress we must regress you must regress they must regress | I must be regressing you must be regressing he must be regressing we must be regressing you must be regressing they must be regressing |
Perfect | V-ing perfect |
I must have regressed you must have regressed he must have regressed we must have regressed you must have regressed they must have regressed | I must have been regressing you must have been regressing he must have been regressing we must have been regressing you must have been regressing they must have been regressing |
Simple form | V-ing form |
I mustn't regress you mustn't regress he mustn't regress we mustn't regress you mustn't regress they mustn't regress | I mustn't be regressing you mustn't be regressing he mustn't be regressing we mustn't be regressing you mustn't be regressing they mustn't be regressing |
Perfect | V-ing perfect |
I mustn't have regressed you mustn't have regressed he mustn't have regressed we mustn't have regressed you mustn't have regressed they mustn't have regressed | I mustn't have been regressing you mustn't have been regressing he mustn't have been regressing we mustn't have been regressing you mustn't have been regressing they mustn't have been regressing |
Simple form | V-ing form |
must I regress? must you regress? must he regress? must we regress? must you regress? must they regress? | must I be regressing? must you be regressing? must he be regressing? must we be regressing? must you be regressing? must they be regressing? |
Perfect | V-ing perfect |
must I have regressed? must you have regressed? must he have regressed? must we have regressed? must you have regressed? must they have regressed? | must I have been regressing? must you have been regressing? must he have been regressing? must we have been regressing? must you have been regressing? must they have been regressing? |
Simple form | V-ing form |
mustn't I regress? mustn't you regress? mustn't he regress? mustn't we regress? mustn't you regress? mustn't they regress? | mustn't I be regressing? mustn't you be regressing? mustn't he be regressing? mustn't we be regressing? mustn't you be regressing? mustn't they be regressing? |
Perfect | V-ing perfect |
mustn't I have regressed? mustn't you have regressed? mustn't he have regressed? mustn't we have regressed? mustn't you have regressed? mustn't they have regressed? | mustn't I have been regressing? mustn't you have been regressing? mustn't he have been regressing? mustn't we have been regressing? mustn't you have been regressing? mustn't they have been regressing? |