内容正文:
U3 The Internet
Discovering useful structures
The present perfect passive voice
present(now)
future
past
Present Perfect Tense
现在完成时
Step 1. 现在完成时的含义
现在完成时含义:表示过去发生的动作现在已经完
成或仍将持续, 强调对现在的影响。表示站在“现在”
的时间角度回顾一个“过去”的事件。
She said she has finished her schoolwork.
She said she had finished her schoolwork.
❌
She has finished her schoolwork and now she can play mobile games to get herself relaxed.
(1)主语 + have/ has + V-过去分词(done)
助动词
Winter has already come,
will it still be far in spring ?
注:主语若是第三人称单数助动词用 has
一:现在完成时的基本结构
Step 2. 现在完成时的结构
现在完成时的基本结构:
S + have/ has + V-过去分词(done)
被动语态的结构:
be(been)+ V-过去分词(done)
Summary:
现在完成时的被动语态肯定式就是:
主语+have/has+been+V-过去分词
人教版2019版 高一 unit3 The Internet grammar【优秀课件】
人教版2019版 高一 unit3 The Internet grammar【优秀课件】
二:现在完成时的被动语态结构
肯定式: S+have/has+been+done (V-ed)
否定式: S+have/has+not+been+done...
一般疑问句: Have/Has+S+been+done...
特殊疑问句: 疑问词+have/has+S+been+done...
三:现在完成时的被动语态的其他结构
人教版2019版 高一 unit3 The Internet grammar【优秀课件】
人教版2019版 高一 unit3 The Internet grammar【优秀课件】
现在完成时的被动语态:have / has + been +V-ed
Practice: 根据要求变换句子。
The children have already been told the good news.
(1)将上面的句子变成否定句。
The children________________the good news yet.
(2)将上面的句子变成一般疑问句。
__________________________the good news yet?
(3)对上面的句子中的the children 进行提问。
___________________the good news yet?
haven't been told
Have the children been told
Who has been told
1.被动的动作在说话之前已完成,强调过去的动作对现在造成的影响或结果,常与之连用的时间状语为:already(已经,肯定句); yet(还没有,否定和疑问句); just; ever; recently,latey 等。
e.g.:
The work has already been finished.
工作已完成了。(结果是现在不用做这项工作了)
The doctor hasn't been sent for yet.
还没有派人去请医生。(现在应派人去请医生)
Step 3.现在完成时的被动语态的用法
过去的单一事件对现在造成的影响
send for派人去请;召唤
2.表示一个被动的动作或状态开始于过去,持续到现在,并且有可能持续下去。常与之连用的时间状语有:for+一段时间;since+过去的某个时间/时间状语从句; so far; up to/till/by now; these days; over time; over/in during the past/recent years.或用于“How long ...?”句型中
e.g.:
Financial problems of the company have been discussed for nearly two hours.
公司的财务问题已被讨论了近两个小时了。(可能继续)
How