一、关系代词的选择
例题1：Is this the book ______ you bought yesterday? A. which B. what C. who D. where 答案：A 析：先行词“the book”指物，从句中缺宾语，应选which或that。指物时可用that或which，指人时用who/whom/that。 例题2：All ______ we need is time. A. who B. which C. that D. what 答案：C 析：先行词为不定代词“all”，关系代词只能用that。二、关系副词的应用
例题3：This is the school ______ I studied five years ago. A. when B. where C. which D. whose 答案：B 析：先行词“school”表地点，从句中缺状语，用where=in which。 例题4：I still remember the day ______ I first came to this city. A. which B. when C. where D. that 答案：B 析：先行词“day”表时间，从句中缺状语，用when=on which。三、whose的用法
例题5：Do you know the boy ______ mother is a doctor? A. who B. which C. whose D. whom 答案：C 析：从句中“mother”与先行词“the boy”为所属关系，用whose“……的”。四、介词+关系代词
例题6：The house ______ he lives is very old. A. which B. where C. in which D. that 答案：C 析：“live”为不及物动词，需加介词“in”，即“live in the house”，故用in which=where。五、限制性与非限制性定语从句
例题7：My sister, ______ is a teacher, lives in Beijing. A. who B. that C. which D. where 答案：A 析：逗号隔开的非限制性定语从句，指人时用who，不可用that。通过练习题可发现，定语从句的关键在于找准先行词，判断从句成分，选择合适的关系词。强化练习能帮助学生熟练掌握不同关系代词和副词的用法，提升英语句子的构建能力。