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8. This street wasn't swept yesterday.

9. She wasn't helped by him yesterday.

10. Were Tom's parents visited by him last week?

11. Why wasn't the roof mended before it fell in?

12. When was this book published?

Bị động QKĐ

(+) S was/were V3/ed (by O)

(-) S was/were (not) V3/ed (by O)

(?) Was/were S V3/ed (by O)?

8. This street wasn't swept yesterday

9. She wasn't helped by him yesterday

10. Were Tom's parents visited by him last week?

11. Why wasn't the roof mended before it fell in?

12. When was this book published?

QKĐ: S + was/ were + PP + (by O)

HTĐ: S + am/ is/ are + PP + (by O)

HTTD: S + am/ is/ are + being + PP + (by O)

HTHT: S + have/ has + been + PP+ (by O)

TLĐ: S + will be + PP + (by O)

TLG: S + is/ am/ are + going to + be + PP + (by O)

S + modal verb + be + PP + (by O)