English verb conjugation
CAN GROUP

Regular verb: group - grouped - grouped

Affirmation

Simple form	V-ing form
I can group you can group he can group we can group you can group they can group	I can be grouping you can be grouping he 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 he 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 he 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 he cannot group we cannot group you cannot group they cannot group	I cannot be grouping you cannot be grouping he 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 he 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 he 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 he group? can we group? can you group? can they group?	can I be grouping? can you be grouping? can he 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 he 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 he 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 he 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 he 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 he 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 he not have been grouping? can we not have been grouping? can you not have been grouping? can they not have been grouping?