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选择性必修三《Unit 4 Adversity and Course》Discovering useful structures 优秀ppt课件
Period 3 Discovering useful structures
The Present Perfect Continuous tense
Unit 4 ADVERSITY AND COURAGE
1.Enable the Ss to master the usage of the Present Perfect Continuous tense
2.Enable the Ss to use the relevant grammar flexibly and authentically in the real situation
单元语法自我探究
What is the tense of the sentence below?
This is the adventure that I have been dreaming of.
Find more examples containing this tense:
1.We are now camped on the ice and we have been managing to survive, but spring is coming, and the ice will soon begin to melt.
2. We have been struggling for days, but things on Elephant Island are going from bad to worse.
Question: what is the function of the present perfect continuous tense?
1.to talk about action that started in the past and stopped recently. There is usually a result now.
2.to talk about action that started in the past and is continuing now. This is often used with for or since.
key: the present perfect continuous tense.
1 现在完成进行时概述
现在完成进行时表示过去发生的动作或状况一直持续到现在，这个动作可能仍在继续进行或刚刚结束。现在完成进行时由“have/has + been + 现在分词”构成。
肯定句：主语 + have/has + been + 现在分词...
否定句：主语 + have/has + not + been + 现在分词...