怎么变定语从句

来源：百度知道 编辑：UC知道 时间：2024/05/26 17:51:05
1，I know the boy.He can speak English well.
2, I gave Mr li a card for Teachers'Day. It was made by myself.
随便问一下怎么样变定语从句有没有什么窍门公式，定语从句中什么时候用where which that 详细一点谢谢！

i know the boy who can speak English well.
i gave mr li a card for teachers's day which was made by myself
定语从句修饰的名词或代词：地点就用where，which修饰物，人就用who
that可以修饰人/物
特殊情况
（1）只用that,不使用which
如：先行词前有序数词、最高级、the only等词语修饰；先行词既有物又有人...
（2）只用which,不用that
引导词前有介词时，只能用which

I know the boy who can speak English well.
先行词是the boy 在定语从句中作作主语，要用who
2, I gave Mr li a card for Teachers'Day which/that was made by myself.
先行词是a card 在定语从句中作主语且指物要用which/that