You went to a talk last night. You are describing the speaker and the event to a coworker who wasn't there. You were just criticizing the speaker for not being interesting, but you don't want to sound too negative about the event. So you say:
She did tell some interesting anecdotes, though.
In a normal sentence, you don't include "did" before the verb:
She told some interesting anecdotes.
But when your sentence is contrasting with something else that you just said, you should use the word "did" and place a strong stress on that word when saying it:
I didn't think he was that good-looking. I did like his hair, though.
In the example above, you're contrasting this positive statement about the speaker with your earlier negative statements.
"Though" is similar to "but" and "however". It is usually used at the end of the sentence in spoken English:
I have a pilot's license. I haven't flown in almost 5 years, though.
In written English, it's more appropriate to use it between clauses:
I have a pilot's license, though I haven't flown in almost 5 years.
"Though" is more casual than "however", which can be used in the same way:
I do agree with the Prime Minister on defense, however.
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