ad.  在前面 ≠ behind

ad.  向前

ad.  将来，今后

ad.  事前；提前；预先 ≈ in advance

ad.  取得进步，获得成功

• straight/dead ahead  就在正前方

• ahead of your/its time 领先于你的/它的时代〔因而不被理解或接受〕

• go ahead 

  可以，干吧；着手做，开始做；发生

• ahead of the game/curve  成功；领先，超越〔竞争对手〕

• get ahead 事业有成

• What advice would Leah give you to move you ahead on your journey? 前行

• For the past several decades, it seems there's been a general consensus on how to get ahead in America: Get a college education, find a reliable job, and buy your own home. 成功

• But when they look ahead, they see roadblocks to their success. 向前看

• You have a long trip ahead of you.

  你前面还有很长一段路要走。

BrE /əˈhed/

NAmE /əˈhed/