Question

Is milk contain in the jug. Passive​

Answer 1

Is milk contained in the jug ? ( Active voice)

${\implies{\sf{}}}$ Does the jug contain milk ? ( Passive voice)

♋P.S :- The tense of the do verb changes according to the auxiliary verbs and the number of persons.

For example : We use does in case of third person singular number and use do in case of others.