人教版八年級英語下冊《What were you doing when the rainstorm came?》SectionA PPT教學課件(第3課時)，共37頁。
Objectives
To learn the grammar-the past progressive tense.
To learn to apply the past progressive tense to talk about the past events.
Grammar Focus
What were you doing at eight last night?
I was taking a shower.
What was she doing at the time of the rainstorm?
She was doing her homework.
What was he doing when the rainstorm came?
He was reading in the library when the rainstorm came.
What was Ben doing when it began to rain heavily?
When it began to rain, Ben was helping his mom make dinner.
What was Jenny doing while Linda was sleeping?
While Linda was sleeping, Jenny was helping Mary with her homework.
1. 以when和while引導的時間狀語從句
1) 延續性動詞和非延續性動詞
延續性動詞指動作可以延續一段時間, 而不是瞬間結束。
如: work、study、drink、eat等。
非延續性動詞指動作極為短暫，瞬間結束。
如: start、begin、hit、jump、knock等。
2) 在本單元中，出現了以when和while引導的時間狀語從句。when表示“當……的時候”。從句中既可用延續性動詞，又可用非延續性動詞，這些動詞既可以表示動作，又可表示狀態。從句中動作既可和主句的動作同時發生，又可在主句的動作之前或之后發生。如：
Mary was having dinner when I saw her.
The boy was still sleeping when his mother got home yesterday morning.
3)while表示“在……的時候”、“在……期間”。
它強調主句的動作與從句的動作同時發生或主句的動作發生在從句的動作過程中。while從句中必須是表示動作或狀態的延續性動詞。如：
The weather was fine while we were in Beijing.
She called while I was out.
如果主句的動作在從句的動作過程中發生，從句常用進行時。如:
While the boys were playing football, it rained.
2. 過去進行時
概念: 表示過去某一時刻或某段時間內正進行的動作。
構成: was/were + 動詞現在分詞
用法:
a: 表示某一時刻正進行的行為，與特定的過去時間狀語連用，常見的時間有: at 8 last night, at this time, at that time, at that moment 等
What were you doing at 10 yesterday morning?
I was writing a letter to my father at that moment.
b: 表示過去某段時間內正進行的動作。
e.g. We were building a house last winter.
They were waiting for you yesterday.
否定句和疑問句：
e.g. We were not sleeping at home.
Was he feeling well?
3.現在分詞的構成
1)一般動詞在詞尾加-ing，如go—going
2) 以不發音字母e結尾的動詞, 先去掉e, 再加-ing
come — coming make — making write — writing
3) 以重讀閉音節結尾的動詞，如果末尾以一個輔字母結尾，應先雙寫這個字母，再加ing，x和w結尾的除外。
get — getting swim — swimming show — showing
4) 以字母y結尾的單詞，直接加ing。如：
carrying playing studying
5) 以字母ie結尾的動詞，變ie為y，再加ing。
die → dying lie →lying
6) 以元音字母加e結尾，或以e結尾，且e發音的動詞，直接加- ing。
see — seeing be — being
4. 使用進行時態的注意事項
1)一些動詞，如see, hear, love, like, know,
remember, understand, have等表示感情、知覺和狀態的詞，一般不用于進行時態。
2) 在there和here引起的句子中，常用一般現在時代替現在進行時。
e.g. Here comes the bus.
There goes the bell.
5. 過去進行時和一般過去時的區別
1) 過去進行時表示過去正在進行的動作，而一般過去時則表示一個完整的動作。如：
They were writing letters to their friends last night.
昨晚他們在寫信給他們的朋友。 (沒有說明信是否寫完)
They wrote letters to their friends last night.
他們昨晚寫了信給他們的朋友。
(表達了他們已寫好的意思，整個寫的過程已完成)
2) 當動作延續較長時間時或表示厭煩、贊美等
感情色彩時, 常用過去進行時表示。如：
He was thinking more of others than of himself.
他考慮別人的比考慮自己的多。
(表示說話者贊揚的口氣)
The boy was always making trouble then .
那時，他總是惹麻煩。(表示說話者厭煩的口氣)
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