GMAT語法考點中的in which和where的用法區別許多同學都不太清楚，出現在題目中也常會有人做錯，下面小編將結合實例，為大家具體分析兩者的使用方法相似和區別所在，幫助大家理清兩者關系和正確用法。
GMAT語法大百科語法點：in which與where的用法說明
1. when , where 可以用在非限制性關系子句中
ex: He came from Herne Bay, where Lally had once spent a holiday.
2. when , where 也可以用在限制性子句中,但前面必須有特定的名詞. 且像" Lodon" 這種專有名詞的地名后面是不跟限制性子句的.
ex: This is the street where I live.
3. 在限制性子句中,
表time: 可用 at which 替代 when
表place, room, street, year, month: 可用in which 替代 where 及 when
ex: the place in which they found themselves.
表day 之后可用on which 替代 when
表 situation, stage, arrangement, system 之后, 可用 in which 替代 where, whereby.
所以, in which 常用在限制性子句中, (簡單看就是前面不要有 ,)可以替代 where, when
1.時間year, month
2.地點 place, room, street,
3. 某種情境 situation, stage, state, arrangement, system
GMAT高頻詞匯in which與where用法實例講解
At Shiprock, New Mexico, a perennially powerful girls’ high school basketball team has become a path to college for some and a source of pride for a community where the household incomes of 49 percent of them are below the poverty level.
(A) where the household incomes of 49 percent of them are
(B) where they have 49 percent of the household incomes
(C) where 49 percent of the household incomes are
(D) which has 49 percent of the household incomes
(E) in which 49 percent of them have household incomes
選項分析：
根據上述where和in which的用法總結，可以很輕易的判斷D是不正確的
然后再按照句子意思來看，主語明顯是收入，而不是人，所以排除B和E
A搭配錯誤，所以最后答案是C。
 

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