Meaning of ALTOGETHER in English
BAD : Afterwards, we played altogether monopoly.
GOOD : Afterwards, we all played monopoly.
BAD : After dinner, we watch altogether television.
GOOD : After dinner, we all watch television.
When you mean 'each person or thing (in a group)', use all after the subject (NOT altogether ): 'The flowers had all died.' 'The children were all tired and hungry.'
Longman Common Errors English vocabulary. Английский словарь распространенных ошибок Longman. 2012