B开头
1) by accident 偶然
2) back and forth 来回地,反复地
3) back of 在...后面
4) before long 不久以后
5) beside point 离题的
6) by air 通过航空途径
7) by all means 尽一切办法,务必
8) by and by 不久,迟早
9) by chance 偶然,碰巧
10) by itself 自动地,独自地
11) by means of 用,依靠
12) by mistake 错误地,无意地
13) by no means 决不,并没有
14) by oneself 单独地,独自地
15) by reason of 由于
16) by the way 顺便说说
17) by virtue of 借助, 由于
18) by way of 经由,通过...方法
19) be able to (do) 能(做)，会(做)
20) be about to (do) 即将，正要
21) be absent from 缺勤，缺课
22) be abundant in 丰富的，富裕的
23) be accustomed to 习惯于，适应于
24) be acquainted with 与…相识，熟悉，了解
25) be active in 积极于
26) be afraid of 恐怕，害怕，担忧
27) be alive to 注意到，对…敏感
28) be angry at 因某事生气
29) be angry with 对…发怒
30) be anxious about 担心，为…担忧
