不定代词是不指明代替任何特定名词或形容词的代词,英语中不定代词有：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.
不定副词有：somewhere 某地,anywhere 任何地方,nowhere 无处,没有地方,everywhere 每个地方,到处.