根据限定词在名词前的位置关系，我们把限定词区分为三类：前位限定词 (pre-determiner)、中位限定词 (central determiner)和后位限定词 (post-determiner)。

 
注意：以上句子看起来并不通顺，是因为三种限定词很少会同时出现，通常情况下只用一种或两种。
（1）前位限定词
1）种类
前位限定词主要是用来说明名词的数量，主要有三种。
①表示倍数关系的数量形容词：
half my salary
twice my salary
double my salary
three times my salary
②表示几分之几的数词：
one third my salary
two-thirds my salary
③个体形容词：
all my salary
both my salaries
2）共存性
前位限定词一般互相排斥，不能共存。例如我们不能说：
all half my salary *
half double her income *
（2）中位限定词
1）种类
①冠词：the，a，an
all the book
half an hour
twice the size
②物主形容词：my，your，his，her，our，their
all my money
all his friends
③指示形容词：this，that，these，those
all these problems
twice that size
four times this amount
④名词属格：
all John’s friends
2）共存性
中位限定词亦彼此排斥，不能同时出现。例如我们不能说：
my the money *
our these problems *
（3）后位限定词
1）种类
①基数词或序数词：one/first，two/second，three/third等。
the two children
his fourth birthday
②一般序数词：next，last，past，previous，subsequent，other，another等。
my next plan
our last meeting
your previous mistake
her subsequent response
③数量形容词：few，many，several，little，less，more等。
my many friends
our several achievements
the few friends that I have
2）共存性
不同于相互排斥的前位和中位限定词，后位限定词可以同时出现在名词前。
my next two plans
several other people
但也有先后顺序问题：
①序数词/一般序数词+基数词：
the first two weeks
during the next 50 years
②序数词/一般序数词+数量形容词：
during the past few years