they were talking loudy 为什么不用they talked loudly呢如果用后者意思有变化么?

they were talking loudy 为什么不用they talked loudly呢如果用后者意思有变化么?
Last week I went to the theatre .I had a very good seat .The play was very interesting .I did not enjoy it .A young man and a young woman were sitting behind me .They were talking loudly .I got very angry .I could not hear the actors .I turned round .Looked at the man and the woman angrily .They did not pay any attention .In the end .I could not bear it .I turned round again.‘ I can `t hear a word ’ I said angrily.
‘It `s none of your business ,’ the young man said rudely .‘This is a private conversation!’