定语从句中不能用which作关系代词的几种情况1.当先行词为all,little,much,few,something,everything,anything,nothing,none等不定代词时,关系代词用that而不用which.Ihaveforgotteneverythingthathetoldmethismorning.AllthatIwantisyouradvice.Thereisnotmuchthatcanbedone.2.当先行词有形容词最高级修饰时,关系代词用that,而不用which.ThisisthebestfilmthatIhaveeverseen.ThemostbeautifulplacethatIhaveeverbeentoisJiuzhaigou.3.当先行词有序数词修饰时,关系代词用that而不用which.Thisisthefirsttimethatwehavemet.4.当先行词被theonly,thevery,thesame,theright等修饰时,关系代词用that而不用which.AmericanaudiencewillseethesamemoviethatwasshowninAsia.5.当先行词被all,every,any,much,little,few,no等修饰时,关系代词用that而不用which.Allthethingsthatyoutoldmearelies.6当先行词既有人,又有物时,关系代词用that而不用which.Hetalkedaboutthemenandbooksthatinterestedhimgreatlyintheschool.7.当主句是以which,who,what开头的特殊疑问句时,引导定语从句的关系代词一般用that而不用which.Whoisthegirl(thatis)sittingbythelake?Whichofthosebooksthatareonthetablebelongtoyou?