Step 6 Special casesA. 關(guān)系詞只能用that而不用which的情況 1．當(dāng)先行詞為all, everything, nothing, anything, much等不定代詞時。Have you taken down everything that Mr Li said?All that can be done has been done.2．先行詞被序數(shù)詞或形容詞最高級修飾時。The first place that they visited in London was the Big Ben.This is the most delicious food that I have ever had.3．先行詞被all, every, no, the only, the very, the last等修飾時。I've read all the books that are not mine.The only thing that she could do was to go to the police for help.I have found the very pen that I lost yesterday.4．當(dāng)先行詞既指人，又指物時。 He made a speech on the men and things that he had seen abroad.B. “介詞＋關(guān)系代詞”引導(dǎo)的定語從句當(dāng)關(guān)系代詞在定語從句中作介詞的賓語時，我們通常用“介詞＋關(guān)系代詞”引導(dǎo)定語從句。如果指“人”，用“介詞＋whom”；如果指“物”，用“介詞＋which”；關(guān)系代詞有時也用whose(作定語)。選用介詞的依據(jù)：1．根據(jù)定語從句中謂語動詞的搭配習(xí)慣(即固定短語)。Yesterday we visited the West Lake for which Hangzhou is famous.(be famous for“因……而出名”)2．根據(jù)先行詞的搭配習(xí)慣(約定俗成，不一定是短語)。This is the camera with which he often takes photos.(with camera“用照相機”)The boss in whose company Mr King worked heard about the accident.(in the boss' company)