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Dear teachers, I am from Malaysia.

Does they convey the same meaning?

1. She lives in the same house as he does.
2. She lives in the same house as him.
3. She lives in the same house as his.

If so, which one is most formal?

Thank you.

Happy Merdeka in Malaysia[Emotion: party]
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Do they convey the same meaning?

1. She lives in the same house as he does.-- OK and proper
2. She lives in the same house as him.-- OK, but only in casual English
3. She lives in the same house as his.-- Not an English phrasing, and the logic is questionable. She lives in his house.
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1 & 2 are correct and 3 is incorrect. They all have the same meaning and 1 is the more formal.
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Mister Micawber3. She lives in the same house as his.-- Not an English phrasing, and the logic is questionable. She lives in his house.

Thanks, Mister Micawber.

These 3 sentences are from my Grammar book.

1. That woman over there has just bought the same video recorder as ours.

2. They're both wearing the same jacket as my husband.

3. Your jacket is exactly the same as mine

They grammar book say using the same as to indicate whether things are identical.

Please help me, I am a bit confused about it.

Could you tell me whether they are correct in both BrE and AmE?
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Sorry, I would like to correct my own sentence.

They grammar book says that using the same as can indicate whether things are identical.

Not only Malaysians often say so, so do Singaporean.

I often hear: ".... the same as mine/ours/my husband."

But I do not know if they are truly correct; this type of sentence is frequently-used.

Hopefully, you would reach out your helping hand to me.
Within these three sentences, the objects are identical models, not the same VCR/jacket. It is obvious that they do not share ownership of a single item. It is the same type of VCR/jacket:

1. That woman over there has just bought the same video recorder as ours.
2. They're both wearing the same jacket as my husband.
3. Your jacket is exactly the same as mine.

However,

She lives in the same house as his.

In this sentence, it is not the same type of house-- at least that is not the normal interpretation, since houses vary individually. I take it as meaning that they live together in one house (in all 3 of your original sentences). If the same type of house is meant, then the grammar is fine but we should add 'type of' to avoid ambiguity.
Thank you, Mister Micawber
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