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In Chinese, the passive voice is commonly expressed using the structure: 主语 + 被 + 动词 + 其他成分. This construction emphasizes the action being done to the subject rather than who is performing the action.
Here, "王老师" (Teacher Wang) is the subject who is affected by the action of being invited.
教室的灯早就被关上了。
(Jiàoshì de dēng zǎo jiù bèi guān shàng le.)
Translation: The classroom lights have long been turned off.
In this case, "教室的灯" (the classroom lights) is the subject that has been acted upon.
那张画儿被买走了。
(Nà zhāng huàr bèi mǎi zǒu le.)
Translation: That painting has been bought.
The passive voice is often used when the doer of the action is unknown, unimportant, or obvious from context. It can also add a level of formality or emphasis to the sentence.
Understanding this structure is crucial for forming clear and effective sentences in Chinese, especially in contexts where the focus is on the action rather than the actor.