English verb conjugation
CAN GROUP

Regular verb: group - grouped - grouped

Affirmation

Simple form	V-ing form
I can group you can group she can group we can group you can group they can group	I can be grouping you can be grouping she can be grouping we can be grouping you can be grouping they can be grouping
Perfect	V-ing perfect
I can have grouped you can have grouped she can have grouped we can have grouped you can have grouped they can have grouped	I can have been grouping you can have been grouping she can have been grouping we can have been grouping you can have been grouping they can have been grouping

Negation

Simple form	V-ing form
I cannot group you cannot group she cannot group we cannot group you cannot group they cannot group	I cannot be grouping you cannot be grouping she cannot be grouping we cannot be grouping you cannot be grouping they cannot be grouping
Perfect	V-ing perfect
I cannot have grouped you cannot have grouped she cannot have grouped we cannot have grouped you cannot have grouped they cannot have grouped	I cannot have been grouping you cannot have been grouping she cannot have been grouping we cannot have been grouping you cannot have been grouping they cannot have been grouping

Interrogative form

Simple form	V-ing form
can I group? can you group? can she group? can we group? can you group? can they group?	can I be grouping? can you be grouping? can she be grouping? can we be grouping? can you be grouping? can they be grouping?
Perfect	V-ing perfect
can I have grouped? can you have grouped? can she have grouped? can we have grouped? can you have grouped? can they have grouped?	can I have been grouping? can you have been grouping? can she have been grouping? can we have been grouping? can you have been grouping? can they have been grouping?

Interro-negative form

Simple form	V-ing form
can I not group? can you not group? can she not group? can we not group? can you not group? can they not group?	can I not be grouping? can you not be grouping? can she not be grouping? can we not be grouping? can you not be grouping? can they not be grouping?
Perfect	V-ing perfect
can I not have grouped? can you not have grouped? can she not have grouped? can we not have grouped? can you not have grouped? can they not have grouped?	can I not have been grouping? can you not have been grouping? can she not have been grouping? can we not have been grouping? can you not have been grouping? can they not have been grouping?