哪几种情况,定语从句的引导词只能用that

只能用that作为定语从句的关系代词的情况 (a) 在there be 句型中,只用that,不用which.(b) 在不定代词,如：anything,nothing,the one,all,much,few,any,little等作先行词时,只用that,不用which.(c) 先行词有the only,...