If you do not know her，much（even， still）less do I．

　　If you can't answer the question，no more can I．

　　Least of all could I kill anyone．

　　Hardly（or Scarcely）（＝Not quite） had he seen me when he called out to me．

　　Never in all her life has she seen such a handsome man．

　　（频度副词或短语）

　　Rarely（or Seldom）（= Not often）did he notice such a matter．

　　Not infrequently may I get the permission to see the boss．

　　No longer can I stand his impudence．

　　By no means must you say that．（方式副词或短语）

　　Under（or In） no circumstances must anyone violate the rules．

　　Only by stealing can he make his living．

　　Only when one has enough to eat can one be honest．（副词+状语从句）

　　No though you made a request would he agree．