做定语从句的题一定要记住两点,第一点找准先行词,第二点是看先行词在后面从句中做什么成分
第一题,这个是非限制性定语从句,先行词和从句由逗号隔开,先行词是liming,在后面的从句中做宾语,并且这个句子正常应该是liming,whom I went to the concert with enjoyed it very much.因为：sb go to someplace with sb,某人和某人一起去某地,但是这个with提前了,所以就变成liming,with whom I went to the concert enjoyed it very much.
第二题,先行词是the days,先行词为物在从句中做主语,不能省略,用that或者which
第三题,这个题考的不是先行词,而是让填谓语动词,先行词是All,all做先行词关系代词只能用that不能用which,all that=what,并且all做主语,谓语动词用复数,这个句子翻译过来是：能吃的东西已经都被吃光了,时态应该用现在完成时,所以选第四个.