1、前位:all,both,half,分数词(one-third,one-fifth等), 倍数词(double,twice,three times等),such;
2、中位:冠词(a,an,the),指示代词(this,that,these,those),不定代词(some,any,either),否定词(no,neither), 全称限定词(every,each),所有格(my,your,John's);
3、后位:基数词(three,200),序数词(first,second,300th,last),数量词及短语(many,much,little,few,plenty of,a lot of,a large number of)等。