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,

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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,
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,

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,
been
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

been
这不是改同义句，而是时态的改变
原句为一般过去时，改后的句子是现在完成时

Mary came to China three years ago. =
Mary has [been ] in China since three years ago.
have been in 表示：在某地待着。
祝学习进步，有不会的可以再问我。(*^__^*)那为什么用been？has/have 后面接be动词的过去分词形式，构成一般完成时。 have been ...

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Mary came to China three years ago. =
Mary has [been ] in China since three years ago.
have been in 表示：在某地待着。
祝学习进步，有不会的可以再问我。(*^__^*)

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2.Mary came to China three years ago. Mary has__in China since 4.同义句 1.isn't it 2.been 3.who walked 4.Why not

mary had learned some chinese before she came to china翻译汉语大神们帮帮忙 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, Tom and Mary came to China last month怎么改成肯定句,否定句和特殊疑问句求翻译:Mary came back to Scotland he,back,china,to,then,came 排列 she came to china _____5.填介词 came,he,china,back,yesterday,to 排列 When do you came to China? came,he,china,back,yesterday,to 排列 jane came to China five years ago Came to China in 1983的意思 They are looking forward to ( )A.Mary came B.mary come C.mary to come D.Mary's coming He opened a hospital when he came to China (以when he came to China 提问) She hasn't written to her husband since she came to China._____ _____ hasn't she written to her husband?两格 Mary came into the ba ras i was giong to When Alice first came to China,she couldn't use the chopsticks________A to eatB eatingC for eatingD to eat with为什么是A. Tom and Mary c_____ to China last month. 英语病句改错Mary wants to visit China a day.