Suppose I'm talking with someone and they say/ask something that I don't get it. Can I use the following sentences?
"I don't understand what she said"
"I don't understand what she asked"?
because he/she already said/asked so it's definitely in the past but for me, I can't use "I didn't understand" because I still don't understand what they're saying or asking. Can someone please explain in detail whether I can use it or not and why?
Thank you in advance for all of your precious help!