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learn about how our country began and how it has changed
网校学员傍晚天**在学习英语零基础直达PETS三级/公共英语三级【年中特惠班】时提出了此问题，已有1人帮助了TA。
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AnnieGuo0909
同学你好，该知识点来自沪江网校《英语零基础直达PETS三级/公共英语三级【年中特惠班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。
同学好：has changed 是现在完成时；
现在完成时强调过去发生并完成的动作对现在造成的影响；结构是：主语+have/has+过去分词。
句意为：了解我们的国家是如何开始的（建立的），以及它是怎样变化的。
has changed 用了现在完成时，就是强调“国家的变化”对现在的影响【如：国家越来越强大了，人民生活越来越好了等】。
祝学习愉快！
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英语零基础直达PETS三级/公共英语三级【年中特惠班】
已有20人在本课程中发现了1277个知识
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本课程热门知识点
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