50. be able to 能,会
51. be afraid of 害怕
52. be amazed/surprised at 对……感到惊讶
53. be angry with 对(某人)生气
54. be awake 醒着的
55. be bad/good for 对……有害/利
56. be born (in) 出生于
57. be busy doing/with 忙于做……
58. be careful with 小心……
59. be covered with/in 被……覆盖
60. be grateful to sb.=be thankful to sb. 感谢某人
61. be excited about 为……而激动
62. be familiar to/with 为……所熟悉的/熟悉某物
63. be famous as/for 作为/因……而闻名
 64. be fed up with 厌倦
 65. be fond of 喜欢……
 65. be full of=be filled with 充满……
 66. be/get lost 迷路
 68. be good/poor at 在……方面擅长/差
 69. be interested in 对……感兴趣
 67. be keen on 喜爱……
 68. be late for 迟到
 69. be on 上演,(灯)开着
 70. be pleased with 对……感到满意
 71. be proud of 以……为自豪
 72. be ready for 为……做好准备
 73. be responsible for 对……负责
 74. be short of 缺乏,短缺
 75. be similar to 和……相似
 76. be worried about 为……担心,着急
 77. be unaware of 不知道,不注意
 78. before long 不久之后
 79. beg  pardon 请原谅,对不起
 80. belong to 属于
 81. break down (机器)坏掉
 82. break into 闯入
 83. break out 爆发
 84. bring up 培育,养育
 85. bump into 撞到
 86. burn up 烧得更旺,烧毁
 87. by air=by plane 乘飞机
 88. by mistake 错误地
 89. by the time 到……的时候
 90. by the way 顺便说,顺便问一下