be tired of 厌烦;对……厌倦
be tired out 疲倦极了
be torn open 被撕开
be true of 适用于
be unconscious of 不知道……
be unequal to 无法胜任……的
be unfit for 不适合,不胜任
be united as one 团结一致
be used as 被……用作
be used to 习惯于
get used to 习惯于
be useful to 对……有用
be well up in 精通,熟悉
be wild with joy 欣喜若狂
be willing to (do) 乐意……
be worried about 为……而担心
be worse off 处境较坏,情况恶化
be worth (doing) 值得(做)