http://english.stackexchange.com/questions/29409/why-use-need-not-instead-of-do-not-need-to
• 是的,但... -聚曦亭- ♀ (889 bytes) () 04/14/2016 postreply 16:52:56
• 謝謝! -虔謙- ♀ (0 bytes) () 04/14/2016 postreply 18:51:17