Using "bei" sentences

Bei Sentences, which are called 被字句 (bèizìjù) in Chinese, are a key way to express the passive in modern Mandarin Chinese. In passive sentences, the object of an action becomes the subject of the sentence, and what would have been the subject of the normal (active voice) sentence, the "doer" of the action, becomes secondary, and may or may not be included in the passive sentence.

What they are

被 sentences (被字句 in Chinese) are simply sentences which use a passive verb and the preposition 被. 被 sentences are not the only way to create the passive verb form in Chinese, but they are the most common, and definitely the type to tackle first.

For the sake of clarity, let's give some examples of the passive in English first:

• The boy ate the hot dog. (normal sentence in the active voice; note that "the hot dog" is the object of the verb "ate")
• The hot dog was eaten by the boy. (the same sentence in the passive voice; "the hot dog" is now the subject, and "the boy" is the "doer")
• The hot dog was eaten. (also in the passive voice, but with the "doer" omitted)

Now let's see those same sentences in Chinese:

• 男孩 吃 了 热狗 。(the original sentence)
• 热狗 被 男孩 吃 了 。(the passive sentence)
• 热狗 被 吃 了 。(the passive sentence, with no "doer")

Why use them?

Passive sentences are used for several main reasons:

1. To indicate that one has been negatively affected.
   • 我 被 开除 了 。 I have been fired.
   • 我的 热狗 被 吃 了 。 My hot dog has been eaten.
2. To shift emphasis from the "doer" of the action to the one affected by that action.
   • 我的 老师 肯定 不 会 被 开除 。 My teacher will definitely not be fired.
   • 只 有 那些 很 好吃 的 热狗 被 吃掉 。 Only those really tasty hot dogs were eaten.
3. To avoid having to mention the "doer" of the action, either because it is unknown, or for other reasons.
   • 我 被 开除 了 。 I have been fired (but I'm not saying who fired me, probably because it's obvious).
   • 我的 热狗 被 吃了 。 My hot dog has been eaten (but I'm not saying who ate it, probably because I don't know).

How to use them

Normal use of 被 has a few preconditions:

1. The verb to be used with 被 needs to have an object (this will become the new subject of the 被 sentence). Verbs that take objects are called transitive verbs.
2. If you're going to state who the verb was done by (the "doer"), then the subject doing the original action must be known.
3. The verb can't be too simple (for example, a one-character verb like 吃). Put simply, something needs to come after the verb. That "something" can be a particle, a complement, or sometimes even an additional object.

Forming a 被 Sentence

Let's use our example above to show how the process works:

• 男孩 吃 了 热狗 。

In this sentence, "the boy" is the subject. The verb is 吃, "to eat," but it needs something else after it, which is 了 in this case. The object is 热狗, "the hot dog."

This sentence meets all the preconditions. Now all you need to do is introduce the preposition 被 and move the parts of the sentence around a bit:

1. The object is 热狗. Move that to the front; it's the new subject in the 被 sentence.
2. Add 被 after the subject, then insert what was previously the subject. (It's now the doer.)
3. Finish off with the verb phrase 吃了. (Don't forget to include the part that comes after the verb!)

So the new 被 sentence is:

• 热狗 被 男孩 吃 了 。

Here's a table illustrating the process of converting a regular sentence into a 被 sentence:

Creating a 被 sentence from a normal sentence

		Subject	Verb Phrase	Object
		男孩	吃了	热狗	。
Subject		Doer	Verb Phrase
热狗	被	男孩	吃了		。

• 男孩 吃 了 热狗 。(the original sentence)
• 热狗 被 男孩 吃 了 。(the passive 被 sentence)

Forming a 被 Sentence with No "Doer"

If we want to, we can also omit the "doer" (男孩) and say:

• 热狗 被 吃 了 。

Let's take a closer look at how you build this kind of sentence.

Creating a 被 sentence with no "doer"

		Subject	Verb Phrase	Object
		男孩	吃了	热狗	。
Subject		Doer	Verb Phrase
热狗	被	男孩	吃了		。
热狗	被		吃了		。

• 男孩 吃 了 热狗 。 (the original sentence)
• 热狗 被 男孩 吃 了 。 (the passive sentence)
• 热狗 被 吃 了 。 (the passive sentence, with no "doer")

Forming a Negative 被 Sentence

There's just one other complication. What if you want to make a sentence in the negative? For example, continuing with our wonderful theme, if you wanted to say:

• The hot dog was not eaten by the boy.

In this case, the negative adverb 没有 needs to be inserted before the 被, and the verb still needs something after it, which in this case is 掉. (We're using 掉, which adds a meaning of "totally" to the verb, because you don't use 了 when you use 没有 to negate.) This is what we get:

Creating a negative 被 sentence

			Subject	Negative	Verb Phrase	Object
			男孩	没有	吃掉	热狗	。
Subject	Negative		Doer		Verb Phrase
热狗	没有	被	男孩		吃掉		。
热狗	没有	被			吃掉		。

• 男孩 没有 吃 掉 热狗 。 (the original sentence, using the negative adverb 没有)
• 热狗 没有 被 男孩 吃 掉 。 (the passive sentence, using the negative adverb 没有)
• 热狗 没有 被 吃 掉 。 (the passive sentence, using the negative adverb 没有, and no "doer")

Adding Adverbs in a 被 Sentence

What if you want to include adverbs in your 被 sentence? Where should those go? They go in the same place as the negative adverb 没有, above. (Frequently you'll see the word "adverbial" or "adverbial adjunct" used in this case, because some words in Chinese, such as time words, act like adverbs but are technically nouns.) In the following example we'll use the adverb 刚, which is used to express that something just recently happened.

Creating a negative 被 sentence

			Subject	Adverb	Verb Phrase	Object
			男孩	刚	吃掉	热狗	。
Subject	Adverb		Doer		Verb Phrase
热狗	刚	被	男孩		吃掉		。
热狗	刚	被			吃掉		。

• 男孩 刚 吃 掉 热狗 。 (the original sentence, using the adverb 刚)
• 热狗 刚 被 男孩 吃 掉 。 (the passive sentence, using the adverb 刚)
• 热狗 刚 被 吃 掉 。 (the passive sentence, using the adverb 刚, and no "doer")

被 Sentences with 给

Sometimes in 被 sentences the word 给 also appears. [unfinished section]

Advanced modern usage

In recent years, special uses of 被 have popped up online. These uses occur with verbs which don't normally ever use 被, in order to emphasize a lack of control over the action, often including some kind of foul play or underlying statistical falsification.

Examples include:

• 被 和谐 (to be harmonized)
• 被 自杀 (to be suicided)
• 被 毕业 (to be graduated)
• 被 就业 (to be employed)
• 被 旅游 (to be (forced to) travel)
• 被 代表 (to be represented)
• 被 失踪 (to be disappeared)

Other ways to form the passive

被 is not the only way to form the passive in Mandarin Chinese. The prepositions 让 and 叫 are also used in passive constructions, although 被 is more common. For more information, see [need links].

Sources and further reading

• ChinesePod (free content): Qing Wen - Passive Verbs and 被
• East Asia Student: Mandarin passive voice: grammar and usage