before【 bi'fɔ:】 
adv.在前，以前；prep.在……之前；conj.在……之前，与其……宁可
 You should have thought of that before you sold it to me!在你把它卖给我之前，你早该考虑到这点。
 May I have a hug before you go?在你走之前我可以抱你一下吗？
beforehand【 bi'fɔ:hænd】 
adv.预先
Get everything ready beforehand.
事先准备好一切。
 We had discussed it beforehand.我们已经预先谈过这个问题了。
beg【 beg】 
v.请求，乞求
I beg you to stop harassing me.
我求你别来骚扰我。
 I beg your pardon?再说一遍好吗?
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beggar【 'begə】 
n.乞丐；vt.使沦为乞丐，使贫穷
The beggar pestered passers-by for money every day.
乞丐每天都纠缠路人乞讨。
 The beggar always spent his money on whiskey.那个乞丐总是把钱花来买威士忌酒喝。
begin【 bi'gin】 
v.开始，首先
Where do we begin?
我们在哪开始好呢？
 Let's begin the game!我们开始游戏吧!
beginning【 bi'giniŋ】 
n.开始
Let's start from the beginning.
让我们从头开始。
 Everything has a beginning and an ending.每件事都有个开始和结尾。
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behalf【 bi'hɑ:f】 
n.为，利益
Please accept this gift on our behalf.
请接受这份代表我们心意的礼物。
 I argued on her behalf.我代表她辩论。
behave【 bi'heiv】 
vi.举动，举止，运转；v.行为表现
Please behave yourself.
请规矩点。
 How could you behave this way?你怎么能这样做？
behavior【 bi'heivjə】 
n.行为，举止，习性
Please be on your best behavior.
请注意自己的言行。
 The boy's behavior embarrassed his parents.那个男孩的行为使他的父母很尴尬。
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