作业帮Mary came to China three years ago.[改为同义句] Mary has [ ] in C
来源：学生作业帮 编辑：作业帮 分类：英语作业 时间：2024/05/18 16:46:09
Mary came to China three years ago.[改为同义句] Mary has [ ] in China since three years ago.
做出答案后要说明原因,
做出答案后要说明原因,
een
come 是终止性动词,它的现在完成时肯定式不能与表示一段时间（FOR,SINCE 等短语）连用,故要改为持续性动词,COME 改为BE IN ,而BE 的过去分词是been
再问： COME 改为BE IN 【为什么？请说明白】
再答： 因为去到某地，就在某地呀，since three years ago.是现在完成时的标志，而现在完成时的结构是have /has +动词的过去分词，BE的过去分词是 been，故用 has been in
come 是终止性动词,它的现在完成时肯定式不能与表示一段时间（FOR,SINCE 等短语）连用,故要改为持续性动词,COME 改为BE IN ,而BE 的过去分词是been
再问： COME 改为BE IN 【为什么？请说明白】
再答： 因为去到某地，就在某地呀，since three years ago.是现在完成时的标志，而现在完成时的结构是have /has +动词的过去分词，BE的过去分词是 been，故用 has been in
Mary came to China three years ago.[改为同义句] Mary has [ ] in C
Mary has been in China since three years ago.等于什么
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