請教英文when和while的用法？.

Question

對when和while的用法有非常的疑惑？.

看了一些發問 問題 ，意思是說 when 是用在過去式的 while是用在進行式的, 那為什麼下面的句子是用過去完成式? 還是句子有問題？

幫我解釋一下 謝謝大家？

While in Taiwan, I had learned how to make caramels.

When I left home, my mother gave me some advice I never forgot.

另外這二句有錯嗎？

I called Judy last month when she had had dinner. 這一句的文法有錯嗎？

還是要這樣寫 I called Judy when she had had dinner last month.

已更新項目:

不好意思 可以具體一點的解釋嗎？

2 個已更新項目:

我想表達的是 上個月我打電話給Judy時他正在吃晚餐。

When I called Judy last month, she had been having dinner.

Judy had been having dinner when I called her last month.

Answer 1

最佳解答

While in Taiwan, I had learned how to make caramels.

While I was living in Taiwan , I had learned how to make caramels.

While living in Taiwan , I had learned how to make caramels.

When I left home, my mother gave me some advice I never forgot

When I left home, my mother gave me some advices I had never forgotten .

I called Judy last month when she had had dinner

上個月我致電Judy, 她當時已經吃完晚飯

I called Judy when she had had dinner last month

我致電Judy當時她已經於上個月才已經吃完晚飯

Answer 2

保證你自己會弄懂，看這裡。

Answer 3

Table of English Tenses

http://www.ego4u.com/en/cram-up/grammar/tenses

(another tool for you)

Answer 4

When I called Judy last month, she was having dinner.

過去進行式was having是一條線，簡單過去式called是一個點，這個點發生在那條線上。

她在吃飯是本句的主要資訊。

Answer 5

While是「然而」

When是「當......的時候」、「在.......的當兒」的意思