18　表示所屬關系或部分與整體關系時用介詞of　Track18

 

先行詞與從句表示所屬關系或部分與整體關系時，關系詞前的介詞常用of，此時of要前置。
a.I bought a book of which the author is a farmer. = ...the author of which...
b.The company, of which Max Harrison was until recently the chairman , has made loss of three million pounds this year.
這家公司今年虧損達三百萬英鎊，直到前不久馬克斯·哈里森還是它的董事長。
c.I saw two dwarfs at the circus of whom neither was over three feet tall. = ...neither of whom...
d.The total cultivated area is 13,000 acres,_________10,000 acres are irrigated fields.
A. which
B. of which
C. in that
D. of that
正確答案：B。
分析：在13,000英畝中有10,000英畝是需要灌溉的田地，描述的正是部分與整體關系，所以選B。
e.The course normally attracts 20 students per year,_________up to half will be from overseas.
A. in which
B. for whom
C. with which
D. of whom
正確答案：D。
分析：同樣表示部分與整體的關系，相當于up to half of the 20 students，所以選D。
與此結構類似的有：a number of whom/which，half of whom/which，the youngest of whom等，即限定詞（some，any，none，all，both，several，enough，neither） / 數(shù)字 / 最高級+ of whom/of which的結構。