Part1 - when之副詞子句!
★ when – as soon as 某一個特定的時間點。
1. I will see Mary when I get into the office. 強調在走進辦公室就可以看見瑪莉,此時還沒看到,而是即將看見!
2. I see Mary when I get into the office. 強調在走進辦公室時就已經看見瑪莉了,此時已經看見或是剛剛看見。
3. I saw Mary when I got into the office yesterday. 時間上可能隔好一陣子才說了這段話,也可能是在回想事情。
▲當主句使『過去進行式』與『過去完成式』其涵義是不相同的。
4. He was going to bed when the phone rang yesterday. 強調電話響時,他正要上床睡覺。
5. He had gone to bed when the phone rang yesterday. 強調電話響時,他已經上床睡覺了。
(上述的用法也可以適用在『簡單式』)
▲當when後面之附屬子句使用『現在式』與『完成式』的涵義也不盡相同。
6. I will return the book to you when I finish reading. 強調看完時就馬上歸還。
7. I will return the book to you when I have finished reading. 強調看完後,可能馬上、也可能過陣子才歸還。