be to do 准备做……
be trapped by (the fire) 被(火)围困
be treated as 把……当作……对待
be under construction 建设中
be unwilling to do 不愿去做
be up to ①高达、达到 ②达到境界、进入角色 ③从事、忙于
be well received 接受效果好、广泛接受
be willing to do 盼望去做……
be worried about 为……担心
be worth doing 值得……
be worth sth. 值多少
be worthy of 值得
be/become known as 作为……而出名
be/become widely accepted 被广泛的接受
beat sb. black and blue 把某人打得鼻青脸肿
beat sb. on the head 碰某人的头
beat sb. to death 打死某人
beat sth. flat 把……压平
become a success 成功
become separated 分开
before all 尤其、特别
before long 没过多久(常用于将来时、过去时)
begin with 以……开始
