现在完成时:现在完成时表示动作过去开始，但持续到现在，或过去发生的动作，对现在产生后果或影响。常和for+一段时间，already, ever, never, just, yet, in the past few years/ over the last thirty years, so far, up to now, since 1980等状语连用。
例如: Great changes have taken place in China in the past few years.注：表示短暂行为的动词不能和延续性时间状语连用。
如:It has been over two weeks since he came back from England.
1)I have been to the war.我参加过打仗。
2)I have been there.我去过那里。
(have been + 副词，不用to; been = gone and returned.)
3)Have you ever been to Australia.你以前去过澳大利亚吗？(ever强调“以前”)
I have never been to Australia.我从未过澳大利亚。
I have never been there.我从未去过那里。
I have never been abroad.我从未去过国外。
He has gone there.
He has gone abroad.
6)He has been there for six months.
1)He has just bought...(他刚买了...)
2)He has been there for six months.(有六个月了。)
3)He has already visited...
4)He has retired now.
5)Have you read any books lately?
6)The train has not arrived yet.
7)I haven’t seen her so far.
有时用up till now 换用so far:
Up till now I have been to New York three times.
=I have been to New York three times so far.
8)I have never been to...
9)Have you ever visited ...?
work for 为...工作（主要用在为某某单位。）
I work for nothing. / I have to work for living.
a great number 许许多多(后接可数名词)
different places 各地，各处。
fly to 乘飞机飞往
I have just received a letter from my brother,Tim.He is in Australia.He has been there for six months.
Tim is an engineer.He is working for a big firm and he has already visited a great number of different
places in Australia.
He has just bought an Australian car and has gone to Alice Springs,a small town in the centre of
He will soon visit Darwin.From there,he will fly to Perth.My brother has never been abroad before,
so he is finding this trip very exciting.
1.He is finding他觉得。用在进行式是一种带有感情色彩的用法find在从句中的用法小结：（两种常见结构） 【已有很多网友发表了看法，点击参与讨论】【对英语不懂，点击提问】【英语论坛】【返回首页】
They found that John was quite a good student.
They found him quite a good student.
He found the trip very exciting.
He found that the trip was very exciting.
He found that this no light task.
He found that this was no light task.(有主谓)
He found this no light task.(宾语补语)