4-An exciting trip
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 Australia. 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.
改写：
I have just received a letter from my brother, Tim. He is in Australia and has been there for six months. Tim who is an engineer 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 which is a small town in the centre of Australia. He will soon visit Darwin from there he will fly to Perth. Tom is finding this trip very exciting because he has never been abroad before.
I have just received a letter from my brother, Tim.
句子结构（主谓宾）：
主（I）+ 谓(have just received) + 宾(a letter) + 状(from my brother) + my brother的同位语(Tim)
在have/has done之间可以加像这样的词：already已经，ever曾经， Just刚刚， long这事很长时间了, also也…
谓语变化（三态 + 一否）：
时态：现在完成时 have done --> have received, received是receive的过去分词
He is in Australia.
句子结构（主系表）：
主（He）+ 系(is) + 表(in Australia)
谓语变化（三态 + 一否）：
时态：一般现在时
He has been there for six months.
句子结构（主谓）：
主（He）+ 谓(has been there) + 状(for six months)
be there 在那里
谓语变化（三态 + 一否）：
时态：现在完成时 have done --> have been, been是be的过去分词
Tim is an engineer.
句子结构（主系表）：
主（Tim）+ 系(is) + 表(an engineer)
谓语变化（三态 + 一否）：
时态：一般现在时
He is working for a big firm and he has already visited a great number of different places in Australia.
句子结构（主谓|主谓宾）：
主（He）+ 谓(is working) + 状(for a big firm)
主(he) + 谓(has already visited) + 宾(a great number of different places) + 地点状语(in Australia)
a number of 大量，许多
a number of jobs 许多工作
谓语变化（三态 + 一否）：
时态：现在进行时 be doing --> is working
现在完成时 have/has done --> has visited, visited是visit的过去分词
He has just bought an Australian car and has gone to Alice Springs, a small town in the centre of Australia.
句子结构（主谓宾|主谓宾）：
主（He）+ 谓(has just bought) + 宾(an Australian car)
并列连词(and) + 谓(has gone to) + 宾(Alice Springs) + 同位语(a small town in the centre of Australia)
a small town in the centre of Australia是Alice Springs的同位语，用来进一步解释说明Alice Springs
谓语变化（三态 + 一否）：
时态：现在完成时 have/has done --> has bought, bought是buy的过去分词; has gone, gone是go的过去分词
He will soon visit Darwin.
句子结构（主谓宾）：
主（He）+ 谓(will visit) + 宾(Darwin)
谓语变化（三态 + 一否）：
时态：一般将来时 will do --> will visit
From there, he will fly to Perth.
句子结构（主谓）：
状语(From there) + 主（He）+ 谓(will fly) + 状(to Perth)
谓语变化（三态 + 一否）：
时态：一般将来时 will do --> will fly
My brother has never been abroad before, so he is finding this trip very exciting.
句子结构（主谓|主谓宾 宾补）：
主（My brother）+ 谓(has never been abroad) + 时间状语(before)
因果连词(so) + 主(he)+ 谓(is finding) + 宾(this trip) + 宾补(very exciting)
be abroad 在国外
谓语变化（三态 + 一否）：
时态：现在完成时 have/has done --> has been，been是be的过去分词
现在进行时 be v-ing --> is finding, finding是find的现在分词
我刚刚收到弟弟蒂姆的来信，他正在澳大利亚。他在那儿已经住了6个月了。蒂姆是个工程师，正在为一家大公司工作，并且已经去过澳大利亚的不少地方了。他刚买了一辆澳大利亚小汽车，现在去了澳大利亚中部的小镇艾利斯斯普林斯。他不久还将到达尔文去，从那里，他再飞往珀斯。我弟弟以前从未出过国，因此，他觉得这次旅行非常激动人心。
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