I think they do, but can someone tell me if these 3 sentences contain conjunctive adverbs:

It is one thing to have a baseball card from that era; undoubtedly, to have the opportunity to see Wagner play, though, that would be a real treat for us both.
You and I, however, should get together very soon and talk about those times when we played baseball together when I was a kid; certainly, memories like those, they last forever. &
The past is a precious thing, you always told me to remember that; nonetheless, I feel like the future is just as important.

Yes. All three sentences contain conjunctive adverbs.

http://www.engl.niu.edu/wac/conjadv.html

Thank you Ms. Sue for helping me.

You're welcome, Mike.

Yes, all three sentences contain conjunctive adverbs. Conjunctive adverbs are used to connect ideas or clauses within a sentence. They often express contrast, addition, result, or other relationships between ideas. Here's the breakdown of the conjunctive adverbs in each sentence:

1. It is one thing to have a baseball card from that era; undoubtedly, to have the opportunity to see Wagner play, though, that would be a real treat for us both.
- The conjunctive adverbs in this sentence are "undoubtedly" and "though." These adverbs add a sense of certainty ("undoubtedly") and introduce a contrast or concession ("though").

2. You and I, however, should get together very soon and talk about those times when we played baseball together when I was a kid; certainly, memories like those, they last forever.
- The conjunctive adverbs in this sentence are "however" and "certainly." "However" introduces a contrast or contradiction, while "certainly" adds emphasis or certainty to the statement.

3. The past is a precious thing, you always told me to remember that; nonetheless, I feel like the future is just as important.
- The conjunctive adverb in this sentence is "nonetheless." It indicates a contrast or contradiction to the previous statement.

To identify conjunctive adverbs in a sentence, look for words or phrases that connect ideas or clauses and indicate a relationship between them, such as contrast, addition, result, or concession.