[billyjapan]

Masaegu,

Thanks very much for that.
The first one seems pretty clear. I read somewhere that しまった implies a level of regret. Not sure if that is right but I suppose it's impossible to tell from one sentence not knowing what they think.

In the second one A and B are just normal people's names...not a pronoun or title or anything. Obviously I'm wrong but I thought that, for example, 加奈子は魚が好き means Kanako likes fish. So it seems like this example is done in a different way. Is that right??

Thanks again