Re: Tense in a conversation
I'm not sure I'm answering the question you're asking but for me:
Originally Posted by sebayanpendam
#1 means that the person is still speaking and you are having trouble understanding anything they are saying throughout the conversation because they speak too quickly.
#2 means that you didn't understand the last few words the person said, because they spoke too quickly.
Note that "catch" would be better here than "catch on".
Sorry, I didn't catch what you said.
Remember - correct capitalisation, punctuation and spacing make posts much easier to read.