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21. The fish tank is cleaned by Hung every afternoon.
22. Is the experiment done by our teacher this afternoon?
23. The washing machine is often fixed by the repairmen.
24. Is that picture drawn by these boys?
25. The lamp isn't lighted by the old woman in the evening.
26. We are sometimes told the traditional stories by my grandmother.
Câu bị động Hiện tại đơn
(+) S + is/am/are V3/ed (by O)
(-) S + is/am/are not V3/ed + (by O)
(?) Is/am/are + S + V3/ed (by O)?