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2. Can Mr. Chen see his old friends as often as
before?
He has lived here since he was born.
No. Because most of his old friends
have moved away.
Lead-in Ask and answer
have/has + done(动词过去分词)
一.现在完成时的用法(一)
1.表示过去发生的动作对现在造成的影响或结果。
I have written some words on the blackboard.
{ There are some words on blackboard now.
wrote some words
on the Bb
The words are on the Bb
Now
Past
现在完成时的用法(二)
I have been a teacher since I left my college(大学).
I became a teacher.
I am still a teacher.
Now
Past
Future
2.表示过去已经开始，持续到现在或将来的动作或状态。
现在完成时用法(三)
3.表示某事直到现在发生了多少次.
I have watched the TV show many times.
1.I have written some words on the Bb already.
Discussion:
What new structures can you find in these sentences?