I can regroup you can regroup he can regroup we can regroup you can regroup they can regroup
V-ing form
I can be regrouping you can be regrouping he can be regrouping we can be regrouping you can be regrouping they can be regrouping
Perfect
I can have regrouped you can have regrouped he can have regrouped we can have regrouped you can have regrouped they can have regrouped
V-ing perfect
I can have been regrouping you can have been regrouping he can have been regrouping we can have been regrouping you can have been regrouping they can have been regrouping
Negation
Simple form
I can't regroup you can't regroup he can't regroup we can't regroup you can't regroup they can't regroup
V-ing form
I can't be regrouping you can't be regrouping he can't be regrouping we can't be regrouping you can't be regrouping they can't be regrouping
Perfect
I can't have regrouped you can't have regrouped he can't have regrouped we can't have regrouped you can't have regrouped they can't have regrouped
V-ing perfect
I can't have been regrouping you can't have been regrouping he can't have been regrouping we can't have been regrouping you can't have been regrouping they can't have been regrouping
Interrogative form
Simple form
can I regroup? can you regroup? can he regroup? can we regroup? can you regroup? can they regroup?
V-ing form
can I be regrouping? can you be regrouping? can he be regrouping? can we be regrouping? can you be regrouping? can they be regrouping?
Perfect
can I have regrouped? can you have regrouped? can he have regrouped? can we have regrouped? can you have regrouped? can they have regrouped?
V-ing perfect
can I have been regrouping? can you have been regrouping? can he have been regrouping? can we have been regrouping? can you have been regrouping? can they have been regrouping?
Interro-negative form
Simple form
can't I regroup? can't you regroup? can't he regroup? can't we regroup? can't you regroup? can't they regroup?
V-ing form
can't I be regrouping? can't you be regrouping? can't he be regrouping? can't we be regrouping? can't you be regrouping? can't they be regrouping?
Perfect
can't I have regrouped? can't you have regrouped? can't he have regrouped? can't we have regrouped? can't you have regrouped? can't they have regrouped?
V-ing perfect
can't I have been regrouping? can't you have been regrouping? can't he have been regrouping? can't we have been regrouping? can't you have been regrouping? can't they have been regrouping?