何必 (why bother / no need)

Save yourself the trouble

• Subj + there is no need何必hé bì + Predicate = a rhetorical "why bother / there's no need".
• there is no need何必hé bìso much这么zhè mepolite客气kè qì = "there's no need to be so polite."
• there is no need何必hé bì gently argues an action is unnecessary.

Subj + there is no need何必hé bì + Predicate

• there is no need何必hé bì questions the point of doing something — expecting "no need".

you你nǐwhy bother何必hé bìso这么zhè mepolite客气kè qi。

• there is no need何必hé bìso much这么zhè mepolite客气kè qì = "why be so polite (there's no need)."

Recap

Read the full reference: HSK 6 grammar — Adverbs.