can group
Regular verb: group - grouped- grouped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
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? 	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?