Please correct and detail my mistakes with explanation, please
The Congress System has been roundly condemned by many hisorians as a tool of reaction.
Case is Past Imperfective since it began in the past and still continued to the past ..:wacko:
Congress System is nominative.
Since System is feminine last letter is 'a'.
'by many historians' is dative since it answers by whom or by what.
'as a tool of reaction' is instrumental since it answers 'how'
Конгресса Система обршился осуждало по многые историкям как инструментом в реакцью.
система - feminine
историкям - masculine
инструментом - masculine