Meeting your ancestors

[典例] have you looked ahead to what you’ ll be doing in five years’ time? 你是否想過五年後你要做些什麼?[短語歸納] look短語：look back 向后看； 回顧                         look out 留神；注意                  look into 調(diào)查look up 查找；形勢(shì)好轉(zhuǎn)；看望                look up to sb. 尊敬       某人              look through 仔細(xì)查閱look forward to sth./doing sth. 盼望           look on 旁觀；看作                   look over 快速瀏覽，復(fù)習(xí)look down (on/upon sth.) 向下看； 輕視[練習(xí)] 用look短語翻譯下面的句子。    1). you should ____________________________________.(翻閱字典查查這個(gè)生詞).2). i am looking forward to ________________________ as soon as possible. (收到你的回信)3). _______________ (當(dāng)心) or you will catch cold.4). i have to _______________________ (把筆記復(fù)習(xí)一遍) for the exam.keys: 1). look up the word in a dictionary   2). hearing from you    3). look out          4). look over my notes4. date back to... = date from... 追溯到……，從……時(shí)候開始就有了   [典例] the church dates back to the 13th century. 這座教堂從十三世紀(jì)開始就有了。[短語歸納] [練習(xí)] 根據(jù)句子的要求在括號(hào)里填入短語或所給詞的適當(dāng)形式。    1). the custom ________ ________ hundreds of years.2). our friendship________ ________ ________ the late 70s. 3). this is a law ________ (date) from the 17th century.    keys: 1). dates back     2). dates back to     3). datingⅴ.重點(diǎn)句子（旨在提供句子結(jié)構(gòu)等所需材料）1. we have been excavating layers of ash almost six metres thick, which suggests that they might have kept the fire burning all winter. 我們一直在挖掘一層層的積灰，幾乎有六米厚，這說明他們可能整個(gè)冬季都在燒火。[解釋]“have been excavating”是現(xiàn)在完成進(jìn)行時(shí)，表示從過去開始一直延續(xù)到現(xiàn)在，或?qū)⒗^續(xù)延續(xù)至將來。如：we have been working on this project for over a month now. 到目前為止，我們一直在處理那個(gè)項(xiàng)目，已經(jīng)花了一個(gè)多月時(shí)間了。