How can i add submit button for each group question along with continue when format is "group by group".

Please provide solution if any one can reply will be highly appreciable.

The groups are actually submited when the "continue" button is clicked (if it is group by group or question by question). Of course the survey will not be marked as completed, but the answers should be stored in the database, even if the respondent doesn't proceed any further (as long as they click the continue button).