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必修2《Learning about Language》PPT课件优质课下载
The Present Perfect Passive Voice
Consolidation
The Present Perfect Tense(现在完成时)
一.结构
肯定句：主语+ have/has +V-ed
否定句：主语+have/has +not + V-ed
一般疑问句：Have /Has +主语+ V-ed+ 其他
特殊疑问句：特殊疑问词+have/has + 主语
+V-ed+ 其他
二. 用法
1.动作发生在过去，并对现在造成影响；常用的时间状语有already, yet, ever, never, just…
Eg：I have already finished my homework.
2.动作发生在过去, 并一直持续到现在，还有可能持续到将来; 通常和for 和since引导的时间状语连用。
Eg：I have been a student for ten years.
One question
How can we express the following
sentence in English?
“脏衣服都已经被洗干净了”
The houses have been destroyed by the storm .
Several soldiers have already been killed in the conflict.
He has been sent to study the new technology in the company.
Have the windows been cleaned?
How many shopping centers have been built in this city?
Do the underlined parts have something in common?
一. 基本结构