Viết sang dạng bị động
They don't speak English in all the conferences .
-----> English..........
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1. The mail had already been delivered the mailman.
→ Bị động(QKHT): S + had + been + V3 + (byO)
2. His work had to finished on time.
→ Bị động(QKHT): S + had + been + V3 + (byO)
3. He ought to be told early.
→ ought to + V_inf
4. The room isn't used very often.
→ Bị động(HTĐ): S + is/ am/ are + V3/ed + (byO)
5. The road to school be widened this year.
6. Have you homework been done?
7. Was your work finished early?
8. Fruit has to picked very early in the morning.
→ Bị động(HTHT): S + have/ has + been + PP + (byO)
... isn't spoken in all the conferences