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grammar and usage(2)_ present perfect continuous tense:68张PPTUnit 1 Tales of the unexplained
Present perfect tense
&
Present perfect continuous tense
Lead-in
Look at the following sentences and try
to explain why the tense is used in these
sentences.
1. We have studied English for about
five years.
2. They have lived there since 1990.
3. She hasn’t finished her homework yet.
4. Eric has just come back.
5. How long have you been here
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压缩包内容:
grammar and usage(2)_ present perfect continuous tense.ppt