ExpressionMost relevant effect
حُفِظَتِ النُّسَخُFocus on preservation rather than naming the agent
فَوَجَدَ بَعْضَهَاLinked result and limited extent of damage
إِنَّمَا نَقَلَهَاCorrecting the alleged action
وَهُوَ يَتَثَبَّتُCircumstance simultaneous with the transfer
فَاسْتَأْذِنُواAction requested under a stated condition
حِفْظُ الْكِتَابِ حِفْظٌ لِلْمَعْرِفَةِGeneral principle, justification and reinforcement
Sound analysis first determines what the audience needs, then considers predication, grammar and discourse relation. The same particle or construction may serve different purposes in different contexts. Surface resemblance alone is not a sufficient classification method.