我這麼翻譯正確嗎？

Why not simply translate it as

There was a hat on my grandmother's table.

If your grandmother has passed away, make it as

There was a hat on my late grandmother's table.

理論上可以

但為了清楚避免which字被誤會
應該寫
There was a hat on my grandmother's table.
There was a hat on the table that belonged to my grandmother.

用which可能誤會是指那hat是你的祖母的...因為只要加多一個逗點
There was a hat on the table, which belonged to my grandmother.
就是指那hat是你祖母的...放在一張枱上。

由於that這連接詞必須指在它前的那名詞(字)，所以不會誤會或懷疑你其實在說那一樣東西。

註：你原文用了過去式，所以依同樣寫句。這些句用that/which跟tense無關的。

Because your sentence has a Non - Restritive clause,(meaning: if the word "table" is left out, will the 2nd clause still make sense?) it should read like this:

There was a hat on the table, which belonged to my grandmother.

another example:


There was a hat which belonged to my grandmother
or
There was a hat that belogned to my grandmother.

Because you have the word table, you must put a comma before which.


Hope this helps.

---The typo errors in past tense on two meanings:-
eg:-Typo errors on the past tense:grandmother instead of grandfather; -eg:-
There was a hat on the table which belonged to my grandmother.
eg:-There was a hat, which belonged to my grandmother, on the table.

正確!!!!

「有頂帽在屬於我袓母的枱之上」可譯為There was an hat on the table which belonged to my grandfather.

1. a hat 不是 an hat, (因第一個字不是a,e,i,o,u)
2. 祖母我想你打錯字了, 是grandmother

你所說的句子可以有兩個方法, 視乎你自己

如現在式, 我想:

There is a hat on the table which is belongs to my grandmother

如過去式

There was a hat on the table which is belonged to my grandmother

希望解答到你

not grandfather but grandmother