be involved with涉及
be sick of对...感到厌倦
be strict with对…要求严格
be taken by surprise被突袭
be lost in thought沉思
be tired from因...而疲乏
be tired out疲倦极
be worse off处境较坏，情况恶化
be wrong with有点毛病，有些不舒服
be used to习惯于
be useful to对…有用
be wild with joy欣喜
be worried about为…而担心
be worth(doing)值得(做)
be glad to(do)乐于(做)，对…感到高兴
be good at(doing)善于，擅长
be true of适用于
be unequal to无法胜任...的
be united as one团结一致
be used as被…用作