Question

定语从句什么时候可以省略

Answer 1

如果关系代词在从句中充当宾语,可以省略。
一、在定语从句中作表语时可以省略。
例句：She is all (that) a teacher should be.
翻译：她具备一个老师应该具备的所有条件。
二、在从句中作补语时可以省略。
例句：He is the nicest teacher (that) the students consider him in their school.
翻译：他就是学生认为学校中最好的那个老师.
三、作状语时可以省略。
1、当先行词是reason，且在定语从句中作原因状语时，可以用关系副词why或关系代词that，可以省略。
例句：That is the reason I did it.
翻译：那就是我做那件事的原因。
2、当先行词是way，且在定语从句中作方式状语时，关联词可用in which或that，也可以省略。
例句：That was the way(in which / that) she worked the problem out.
翻译：她就是用那种办法解决问题的。
3、当先行词是time时，关联词可用when，that或省略。
例句：I don't know the exact time (when/ that) the sports meeting will take place.
翻译：我不知道运动会举办的确切时间。
4、当先行词是place时，关联词可用where，that或省略。
例句：The place(where/ that) we will have our picnic is not decided yet.
翻译：我们举行野餐的地点还没定下来。