that 不可使用時機

that  不可使用時機

1. 前面有介係詞 (例外 in that 當成因為 so that 為的是; 以便 )
2. 前面有逗點
3. 先行詞是 people

of which 的使用

 I saw a mountain.
我看到一座山。

The top of the mountain was completely covered in snow.
山頂覆滿白雪。

先行詞a mountain交集，應改寫為關係詞。
但是無生物的which缺乏所有格，
只能借用表示「人」的whose，成為：

I saw a mountain whose top was completely covered in snow.

又回覆到兩個名詞mountain交集的情況，所以關係代名詞仍然是which，成為：

I saw a mountain the top of which was completely covered in snow.

也可以選擇把of which移到句首，成為：

I saw a mountain of which the top was completely covered in snow.

介係詞 + which
                  whom

Jane came to my office on Monday at 8pm.

Monday was the day on which Jane came to my office at 8pm.

8pm was the time at which Jane came to my office on Monday.

Monday was the day on which and 8pm was the time at which Jane came to my office.



We bought a dozen eggs. We cooked five of them. The five were bad.

We bought a dozen eggs, of which five that we cooked were bad.



John arrived at South Station.

South Station was the station at which John arrived.

(ok: South Station was the station where John arrived.)

(More US-style: South Station was the station that John arrived at.)



I gave the book to John.

John was the one to whom I gave the book.

(US-style: John was the one who I gave the book to.)



I starred at the beautiful model.

The beautiful model was the one at whom I starred.

(ok: The beautiful model was the one whom I starred at.)

(US-style: The beautiful model was the one who I starred at.)