先行詞	主格	受格	所有格
人	who / that	who / whom / that	whose
物（事物、動物）	which / that	which / that	whose
人＋物	that	that	x
主格：The man who saved me lived in this house. 先行詞＋關代主格＋動詞受格：He’s the man who I talked about. 先行詞＋關代受格＋主詞＋動詞所有格：That’s the man whose house was burned down. 先行詞＋關代所有格＋名詞

補充:關係代名詞在關係子句中當受詞時，介系詞也可以放在關係代名詞的前面。此時，介系詞後面的關係代名詞不可用 who 或 that，先行詞為「人」用 whom，「物」用 which，且不可省略。先行詞後有逗號也是相同規則。

關係副詞＝介系詞＋關係代名詞（which）: 1. when表「時間」= in / on...＋which;

2. where表「地方」＝in / from...＋which

複合關係代名詞 what 是用來代替「先行詞＋關係代名詞」= the thing(s) which

1. Cindy: Do you know the girl 　　　 a beautiful voice? Bella: Yes. She’s Jenny.

2. Cindy: Do you know the girl 　　　 voice is beautiful? Bella: Yes. She’s Jenny.

1~2提示: who has that in whose

3. Jenny is the girl 　　　 I talked last night.

4. Ann: Do you understand 　　　 I’m saying? Bob: No, I don’t. Could you say that again?

3~4提示: who whom what with whom

5. I will show you the coffee shop 　　　 I like most tomorrow.

6. I will show you the coffee shop 　　　 I first met Mandy tomorrow.

5~6提示: what who which where

7. I think my brother, 　　　 you met yesterday, is very smart.

8. I think 　　　 the man you met yesterday is very smart.

7~8提示: whom that which where

9. I already told you everything 　　　 happened last night. Could you leave me alone now?

10. I already told you 　　　 happened last night. Could you leave me alone now?

9~10提示: who that whose what

11. We couldn’t find the park 　　　 we used to play before.

12. We couldn’t find the park 　　　 we used to play in before.

11~12提示: who which where whose

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