《The internet》SectionⅢ PPT
專項突破
現(xiàn)在完成時的被動語態(tài)
1．(教材P28)Much________________________ (write) about the wonders of the World Wide Web．
2．(教材P28)But the Internet _________________ (do) much more for people than simply make life more convenient．
3．(教材P28)Many people _______________________ (help) by the club．
4．(教材P28)She no longer feels lonely, and her company __________________ (become) quite successful．
5．(教材P32)Today I thought I’d blog about a question that _________________ (ask) many times—how do you stay safe online and avoid bad experiences on the Internet?
一、現(xiàn)在完成時的被動語態(tài)的結(jié)構(gòu)
肯定式 主語＋have/has been done．．．
否定式 主語＋have/has not been done．．．
一般疑問式 Have/Has＋主語＋been done．．．？
特殊疑問式 疑問詞＋have/has＋主語＋been done．．．？
◆He has been selected to take part in the sports meeting．
他已被挑選出來參加運動會。
◆The ink has not been removed from his overcoat．
墨跡還沒有從他外套上去掉。
◆Has the date for the next meeting been decided?
下次會議的日期已確定了嗎？
◆How long has the battery not been changed?
電池多久沒有更換了？
二、現(xiàn)在完成時的被動語態(tài)的用法
1．現(xiàn)在完成時的被動語態(tài)同它的主動語態(tài)一樣，強調(diào)過去的動作對現(xiàn)在造成的影響或結(jié)果，通常與already, yet, just, never, recently等副詞連用。
◆The machine has already been repaired．
機器已經(jīng)修好了。
2．表示一個被動的動作或狀態(tài)開始于過去，持續(xù)到現(xiàn)在，并可能持續(xù)下去，常與for或since引導(dǎo)的時間狀語連用，或用于“How long ．．．？”句型中。
◆Financial problems of the company have been discussed for nearly two hours．
公司的財務(wù)問題已被討論了近兩個小時了。
◆How long has this film been shown?
這部電影已放映多長時間了？
3．用在時間或條件狀語從句中，表示將來某時已完成的動作，即用現(xiàn)在完成時的被動語態(tài)代替將來完成時的被動語態(tài)。
◆You shouldn’t leave school before your homework has been finished．
在你的作業(yè)沒完成之前你不應(yīng)該離開學(xué)校。
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