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Hi, everyone. Is this sentence below correct?

It was surprising that she should be talking to a lot people at the party. She's usually so shy.

It was surprising that she be talking to a lot of people at the party. She's usually so shy.

It was surprising that she was talking to a lot of people at the party. She's usually so shy.

Are all of them have the same meaning, which I think so? <-- by the way, is this sentence correct?

Thanks in advance.
Comments  
See the first two threads here on putative should:

http://www.EnglishForward.com/search/putative should.htm

Putative should: means, approximately, imagining (the situation) that something happens. More general than the 3rd one, to me, and similar to the 2nd (but 2nd is very formal and a bit old). Seems an existential choice to me (something happens, a situation exists or emerges).
Thank you for your very helpful answer and the wonderful link.

LiJ
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The first and third are fine. The middle one is not.

CJ
LiveinjapanAre all of them have the same meaning, which I think so? <-- by the way, is this sentence correct?
Hi, Liveinjapan, that's a common mistake, often made by Asian learners, I think. They tend to use the verb "to be" when they need "to do". So you should have written "Do all of them have the same meaning?" or "Do they all have the same meaning?" - Common similar mistakes are:
Are you live in Japan? ---> Do you live in Japan?
Where are you live? ------> Where do you live?
Now you know Emotion: smile
CalifJimThe first and third are fine. The middle one is not.

CJ

It is in the South West of England and in Kidnapped.

Emotion: wink
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C'mon, Milky. Do you call it "standard"?
Thanks everyone.Understand.

LiJ