Learn Arabic (Modern Standard): هل أنتم في الملعب الآن؟

أنتم (antum) is the plural 'you,' used when talking to a group of three or more people. If you were asking just one man, you would use أنتَ (anta). Note that أنتم is used for an all-male group, or a mixed group of men and women.

Where is the word for 'are' in this Arabic sentence?

There isn't one! Arabic doesn't use the verb 'to be' (am/is/are) in the present tense. If you remove the question word, the sentence literally reads 'You [plural] in the stadium now,' which is a perfectly complete sentence in Arabic.

Does هل translate exactly to 'are' in this sentence?

Not exactly. هل (hal) is a special question word that you put at the very beginning of a sentence to turn it into a 'yes or no' question. Because English uses 'Are...?' for this kind of question, it translates that way here, but هل simply acts as a question mark at the start of the sentence.

How does the word الملعب (al-mal'ab) get its meaning?

It comes from the Arabic root for playing (ل-ع-ب). By adding the 'ma-' sound to the beginning of a root, Arabic often creates a word that means 'a place where the action happens.' So, a 'place of playing' becomes a stadium, pitch, or playground!