不定代词,即不指明代替任何特定名词或形容词的代词.
常用不定代词有：
some（something,somebody,someone,somewhere）,any（anything,anybody,anyone,anywhere）,no（nothing,nobody,no one）,every（everything,everybody,everyone,everywhere）,all,each,both,much,many,（a）little,（a）few,other（s）,another,none,one,either,neither等.一般来讲,修饰不定代词的词要置于其后
具体介绍请见下面的链接