1.A chip off the old block! "a chip off the old block "＂（性格上）特随父母，和父母象＂
eg: My mother and I are very alike. I'm a chip off the old block. 我个我妈特象，简直几是她的翻版．
2.You know she' s bound to run off. "run off "＂闪人，突然离开sb/sth/某地＂
eg: A: Why did you run off in the middle of the movie?你咋在电影演半道就走了呢？
B: I wasn' t feeling well so I went home.我觉得不太舒服就回家了．
3.You know better than to go off all alone. "to know better (than to do sth) "＂你知道不该去做sth＂
eg: A: A stranger man was following me when I was walking home last night.昨晚我回家的时候有个陌生男人一直跟着我．
B: You should know better than to walk alone at night.你该知道别晚上一个人走．