Ist die Grammatik falsch?
"I have done work experience in a book shop where I kept clean the working area, served costumers, sorted books and did errands." Soll für ne Bewerbung sein :D
bookshop ist EIN Wort.
kept the sales area / working area ( je nach dem, was gemeint ist) clean
I have working experience due to a job in a book shop where I kept the working area clean, served customers, sorted books and ran on errands.
My 2 cents ^^
have done work experience geht nicht
have acquired work experience