Student or Learner
what does this sentence mean?
"I can really use a glass of wine now."
I'm not sure, but it's another way of saying "I could use a glass of wine now."
Merriam-Webster's Learner's Dictionary
do with [phrasal verb]
do with (something) : to be helped by having (something)
▪ I could (really) do with a cup of hot coffee right now! [=I could use a cup of coffee; I would like/appreciate a cup of coffee]
▪ I could do with a little less criticism right now, if you don't mind!