单复数同型：所有不可数名词（如water,ink,milk）,所有集体名词（如people,seafood,fish）.形容词与副词同型：far,hard,early,fast,late,pretty,bright,deep,high,slow,enough,daily,weekly,monthly,quarterly,yearly,badly原型与过去式,过去分词同型：read,put,hit,bet,bid,cast,cost,let,spit,hurt动词与名词同型：所以动名词（如rise,fall,light）主语与宾语同型：you,it形容词性物主代词与名词性物主代词同型：his,its形容词和名词同型：所有数词（如three,four,six）,good,circle,vegetable