The students did not put the rubbish in the bins after the party yesterday.

=> The rubbish......

Đáp án: The rubbish wasn't be put in the bins by the students after the party yesterday.

`->` Bị động thì QKĐ:
S + was/were + P2 + (by O)

`-` The rubbish: ngôi thứ `3` số ít `->` tobe là was

`answer`: The rubbish was not put in the bins after the party yesterday by the students.

==================

`@` cấu trúc câu bị động qkđ: Subject + was/ were (not) + V3/ed + (by + doer) + (…)