back up 后退，支持;
base on 基于
be able to能夠，勝任
be about to正打算
be accustomed to習(xí)慣于
be associated with 與……有關(guān)，與……有關(guān)系
be aware of 意識(shí)到;
be capable of 有能力干;
be caught 遇到，陷入
be committed to被交給┄,答應(yīng)承擔(dān)┄義務(wù);
be confined to 限制在,局限于;
be confined/be restricted受……限制
be dedicated to 奉獻(xiàn),獻(xiàn)給;
be devoted to 被用于，貢獻(xiàn)給
be directed to指向，針對(duì)
be drawn to 被┄所吸引;
be due to由于，因此
be exposed to 暴露在┄下,處在┄的作用之下;
be fond of 喜愛
be full of 充滿他
be habitual to(him) 對(duì)(他來說)習(xí)以為常
be in order合適，恰當(dāng)。
be involved in 參與，參加;
be involved with 與……有關(guān)連，
be left to 由┄來決定,由┄來想辦法;
be limited to限制在┄,限定在┄;
be linked to/with something 與……連接
be proud of 為~而驕傲。
be referred to被提及，被提交
be related to與……有關(guān)
be sick of 厭惡┄,討厭┄;
be subject to 經(jīng)受,遭受;
be suitable for適合于
be sure of 對(duì)┄的肯定;
be thrown in 額外贈(zèng)送
be tied by/with被……捆綁
be tied to 束縛于，捆綁于
be tired of 厭倦┄,厭煩┄;
behind time 晚點(diǎn)
belief in對(duì)……的真實(shí)性或正確性具有的信心
believe(… to be) 相信……是
better than好于……
beyond question毋庸置疑
break away脫離，逃跑
break down 損壞，分解，瓦解
break into闖入
break in強(qiáng)行進(jìn)行，打斷
break off斷絕，結(jié)束
break out突發(fā)，爆發(fā)
break through突破
break up終止，結(jié)束，打碎
bring about 產(chǎn)生;
bring forward 提出。
bring out 使出現(xiàn);公布;出版;
bring up 培養(yǎng)，養(yǎng)大;
by accident偶然，含有不幸的因素
by all means無論如何，必定
by chance偶然，意外地
by choice處于選擇
by contrast 對(duì)比之下;
by means of 用，依靠; 借助于
by means of借助于
by mistake錯(cuò)誤地
by the way順便提一下
by virtue of 憑借，借助;因?yàn)椋?by way of經(jīng)由，通過…方式