YOU SAID:
Have you cup a cup of tea?
INTO JAPANESE
あなたはお茶を一杯飲んだことがありますか?
BACK INTO ENGLISH
Have you ever had a cup of tea?
INTO JAPANESE
お茶を一杯飲んだことがありますか。
BACK INTO ENGLISH
Have you ever had a cup of tea?
That didn't even make that much sense in English.