Have you packed yet
【例】 (1)she has seen the film before.
她以前看過這部電影。
(2)mary must have seen jim a week ago.
瑪麗一周前肯定見過吉姆。
(3)a lot of new things have happened since ten years ago.
自十年前以來發生了很多新鮮事。
4. since, for
since“自從”,表示的是一個時間點,可用作介詞,也可作連詞。用作介詞時,后接指時間點的名詞或短語;用作連詞時,后跟一個時間狀語從句,但其前的謂語動詞或主句的謂語動詞須用現在完成時。for構成的短語在現在完成時里,表示時間的長度,后須跟“一段時間”,不可跟“時間點”。
【例】 (1)he has worked at that factory since he came to the city.
他到這城市以來一直在這家工廠工作。
(2)i have studied english for three years.
我學習英語已有三年了。
點撥重點難點
1.現在完成時與幾個副詞的關系;延續性動詞與非延續性動詞和時間狀語的關系。
2.本單元中出現的常用詞及短語,如:water, light, last, appear, search和clean out, turn off等的用法。
3.yet與already, so far以及because of與because的用法。
4.talk about recent events的表達方式及句型。
5.海外華人尋根的經歷及感受。
拓展發散思維
發散思維分析
1. have you packed yet?
你已經包裝好了嗎?
yet表示“仍然,還”多用于否定、疑問句中;still“仍然,還”多用于肯定句中;already“已經”多用于肯定句中,在疑問中常用yet替換,already用于疑問或否定句中表示驚奇。三個詞都常與完成時連用。
【例】 (1)have you had your lunch yet?
你已吃過中飯了嗎?
(2)they’re still working hard.
他們仍然努力地工作。
(3)they haven’t finished their homework yet.
他們還沒有完成家庭作業。
(4)our visitors have come already.
來賓已到。
(5)have you already had breakfast?
難道你吃過早飯了嗎?
(6)you’re not leaving us already, are you?
你不會就要離開我們吧,是不是?
2. have you turned off your radio?
你關掉收音機了嗎?
turn off是切斷電源的意思,它的反義詞是turn on。
【例】 (1)his mother told him to turn off tv and do his homework.
他母親叫他關掉電視去做作業。
(2)he turned on the radio as soon as he got home.
他一到家就打開收音機。
3. i have so many chores to do today.
我今天有太多的雜活要做。
so many“太多”,后跟可數名詞的復數形式,so much“大多”后跟不可數名詞。
【例】 (1)the students have so much homework to do every day.
學生們每天都有太多的家庭作業要做。
(2)the woman had so much sweet food that she became very fat.
那婦女甜食吃得太多,結果變得很胖。
(3)he said he had so many books to read.
他說他有太多的書要讀。
(4)her mother always has so many things to do.
她母親總有太多的事要做。
4. …and do some shopping.
我要買東西。
do some shopping表示“購物”,do+v.-ing形式可以構成很多短語。
【例】 (1)he often does some reading in the evening.
他經常晚上看點書。
(2)she often helps her mother do some washing.