下面的内容摘自《剑桥英语语法》第1040页,为什么第i-ii句是 supplementary
relatives,而第iii-iv却是 integrated relatives 呢?supplementary
relatives 和 integrated relatives 如何理解?如何区分?
i She’s just sat her final exam, [the result of which we expect next week].
ii She investigated all the complaints, [most of which were well founded].
iii They are members of an association [the first and most precious principle of which is mutual trust].
iv Police are looking for a Ford Escort [the licence number of which ends in 7].
Much the most frequent preposition is of, and the construction is found more often in supplementary relatives ([i–ii]) than in integrated ones ([iii–iv]). Example [ii] illustrates the quite common case where of which is a partitive complement.