be tired out 疲倦极了
be true to 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 useful to 对…有用
be well up in 精通,熟悉
be wild with jay 欣喜
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)
be wrong with 有点毛病,有些不舒服