school's dining room is very large和She gave me a birthday present为什么school是school's而birthday不用birthday's,

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school's dining room is very large和She gave me a birthday present为什么school是school's而birthday不用birthday's,
school's dining room is very large和She gave me a birthday present
为什么school是school's而birthday不用birthday's,

school's dining room is very large和She gave me a birthday present为什么school是school's而birthday不用birthday's,
你好,很高兴为你解答!
这里考察的是名词作定语的知识.
作定语的名词往往是说明其中名词的材料、用途、时间、地点、内容、类别等.
⒈材料
a diamond necklace
a bamboo pole
paper money
a stone bridge
⒉用途
a meeting room
the telephone poles
the railway staion
trade union
water pipe
welcome speech
eye drops
⒊时间
a day bed
the dinner party
the Apring and Autum Period
evening suit
midday lunch
⒋地点
London hotels
Beijing University
body temperature
the spaceship floor
the kitchen window
⒌内容
a story book
piano lessons
the sports meet
oxygen supply
the air pressure
the grammar rules
⒍类别
children education
enemy soldiers
a bus driver
school不属于这些可作定语的名词范畴,而birthday是作用途,因此可作定语.
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用school's是因为school的意思是学校而不是学校的,所以加个一瞥s,这就成了学校的dining room。(dining room 这是一个地方嘛。所以什么什么的地方)。而birthday就好像是dining room一样的。birthday它是个名词。birhtday present是生日礼物的意思。不需要的。如果加一瞥s就是生日的礼物,不就错了嘛。...

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用school's是因为school的意思是学校而不是学校的,所以加个一瞥s,这就成了学校的dining room。(dining room 这是一个地方嘛。所以什么什么的地方)。而birthday就好像是dining room一样的。birthday它是个名词。birhtday present是生日礼物的意思。不需要的。如果加一瞥s就是生日的礼物,不就错了嘛。

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school's 是代表名词的所有格的形式,统称为所有学校里面的要加‘S..而生日这个名词不能加'S 因为它就只有一种形式。。望采纳谢谢。。