南通崇川区专业的小升初英语语法辅导班
一、定语从句
引导定语从句的关系代词有that,which,who（宾格whom），所有格whose）和关系副词 where when why 等，关系代词或关系副词在定语从句中充当一个成分，关系代词that，which,who,whom等在从句中分别作主语或宾语，whose在从句中作定语，而关系副词when,where,why等在从句中作状语。 如：
1.I will never forget the days when/in which we worked together.
2.I will never forget the days which/that we spent together.
解析：在句①中，表示时间的名词the days在从句中充当的是状语，所以用关系副词when来代指，引导定语从句修饰先行词the days；
而在句②中，表示时间的名词the days在从句中充当的是动词spent的宾语，所以用关系代词that或which来代指。
同样，表示地点或原因的名词如果在从句中作状语，则用关系副词where 或why来代指；如果在从句中作动词的宾语，则用which或that来代替。 如：
1.This is the factory where/in which I worked.（作状语）
2.This is the factory that/which I visited years ago.（作宾语）
注：当先行词为time,reason, place时，引导词可以省略。如：
1.This was the first (when/what) I had serious trouble with my boss.
2.That is the reason (why) I did it.
3.This is the place (where) we met yesterday.
另外，定语从句中谓语动词的数应与先行词的数相一致。如：
1.Mr. Jackson is the only foreigner that is present at the party.
2.He is one of the students who were praised by the teacher.
解析：在句①中，先行词foreigner被only修饰，强调只有一个，所以从句中谓语动词用单数形式，而在句②中，who引导的定语从句修饰先行词the students，为复数，所以从句谓语动词应为复数。
引导定语从句的关系代词有that,which,who（宾格whom），所有格whose）和关系副词 where when why 等，关系代词或关系副词在定语从句中充当一个成分，关系代词that，which,who,whom等在从句中分别作主语或宾语，whose在从句中作定语，而关系副词when,where,why等在从句中作状语。 如：
1.I will never forget the days when/in which we worked together.
2.I will never forget the days which/that we spent together.
解析：在句①中，表示时间的名词the days在从句中充当的是状语，所以用关系副词when来代指，引导定语从句修饰先行词the days；
而在句②中，表示时间的名词the days在从句中充当的是动词spent的宾语，所以用关系代词that或which来代指。
同样，表示地点或原因的名词如果在从句中作状语，则用关系副词where 或why来代指；如果在从句中作动词的宾语，则用which或that来代替。 如：
1.This is the factory where/in which I worked.（作状语）
2.This is the factory that/which I visited years ago.（作宾语）
注：当先行词为time,reason, place时，引导词可以省略。如：
1.This was the first (when/what) I had serious trouble with my boss.
2.That is the reason (why) I did it.
3.This is the place (where) we met yesterday.
另外，定语从句中谓语动词的数应与先行词的数相一致。如：
1.Mr. Jackson is the only foreigner that is present at the party.
2.He is one of the students who were praised by the teacher.
解析：在句①中，先行词foreigner被only修饰，强调只有一个，所以从句中谓语动词用单数形式，而在句②中，who引导的定语从句修饰先行词the students，为复数，所以从句谓语动词应为复数。
