ad.

1. 大概，或许，可能
   --"Will he come?" --"Perhaps not."

   —“他会来吗？” —“大概不会。”

   Perhaps I can help you.

   也许我能帮你忙。

n.

1. 假定，猜想；未定之事[P1]

adv.

1. expressing uncertainty or possibility.
2. used when making a polite request or suggestion.