61. Post might be the excursion until Saturday.

=> S + can / might / should +be +  V3/ed + (by O)

=> place + by + time

62. Announce the exam is being resulted tomorrow

=> S + am/is/are + being + V3/ed + (by O)

=> place + by + time

63. The building ought to be white-washed for the celebration.

=> S + should / can / động từ khuyến thuyết + be + V3/ed + (by O)

=> place + by + time

64. A birth certificate muts be attached to the application.

=> S + should / can / động từ khuyến thuyết + be + V3/ed + (by O)

=> place + by + time

65. Are the machines bought from Korea by his company?

Chúc bạn học tốt

$61.$ The excursion might be postponed until Saturday.

$62.$ The exam result is going to be announced tomorrow.

$63.$ The building for the celebration ought to be white-washed.

$64.$ A birth certificate must be attached to the application.

$65.$ Are the machines bought from Korea by his company?

$-------$

`-` Câu bị động với động từ khuyết thiếu (modal verbs):

S + modal V + be + VpII + (by O)

`-` Câu bị động thì hiện tại đơn:

S + is/am/are + VpII + (by O)