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一下子 (yīxiàzi) can be used as an [[adverb]] meaning "all at once." It has to come at the beginning of the sentence.
== Basic Usage ==
=== Structure ===
一下子 (yīxiàzi) is a very informal expression to describe how fast things happened. In colloquial Chinese, "一下" is also used.
Subj. + 一下子 + Verb + 了
=== Examples ===
*他 一下子 吃 了 三 碗 米饭。Tā yīxiàzi chī le sān wǎn mǐfàn.He ate three bowls of rice all at once.
*天气 一下子 变 冷 了。Tiānqì yīxiàzi biàn lěng le.The weather is suddenly getting cold.
*她 下楼 的时候 不 小心，一下子 摔倒 了。Tā xiàlóu de shíhou bù xiǎoxīn, yīxiàzi shuāidǎo le.She wasn't careful going down the stairs, and suddenly fell.
*这 些 问题 不 可能 一下 都 解决。Zhè xiē wèntí bù kěnéng yīxià dōu jiějué.These problems can't be solved all at once.
*她 在 美国 的 第 一 个 月一下 瘦 了 十 斤。 One "jin" = 500gTā zài Měiguó de dì yī gè yuè yīxià shòu le shí jīn.She lost ten jin the first month she was in the USA.
== Used with 就 ==
=== Structure ===
Subj. + 一下子 + 就 + Verb + 了
=== Examples ===
*听 他 说 完，我 一下子 就 明白 了。Tīng tā shuō wán, wǒ yīxiàzi jiù míngbai le.After hearing him out, I understood everything all at once.
*他 是 最 高 的，我 一下 就 看到 他 了。Tā shì zuì gāo de, wǒ yīxià jiù kàndào tā le.He is the tallest. I spotted him right away.
*拍 完 那 部 电影 以后，他 一下子 就 出名 了。Pāi wán nà bù diànyǐng yǐhòu, tā yīxiàzi jiù chūmíng le.He became very famous soon after that movie.
*他 的 新 书 很 受 欢迎，一下 就 卖 了 三 千 本。Tā de xīn shū hěn shòu huānyíng, yīxià jiù mài le sān qiān běn.His new book is very popular. Three thousand books were sold all at once.
*老师 给 了 我 一点 提示，我 一下子 就 想 起来 了。Lǎoshī gěi le wǒ yīdiǎn tíshì, wǒ yīxiàzi jiù xiǎng qǐlai le.The teacher gave me a little hint. I recalled it right away.
==See also==
*[[Verb reduplication with yi]]
*[[Verb reduplication]]
== Sources and further reading ==
* [[Integrated Chinese: Level 1, Part 1 (3rd ed)]] (p. 126) [http://www.amazon.com/gp/product/0887276385/ref=as_li_ss_tl?ie=UTF8&tag=allset-20&linkCode=as2&camp=217145&creative=399369&creativeASIN=0887276385 →buy]
*[[40 Lessons for Basic Chinese Course (基础汉语40课上册）]] (p. 206)[http://www.amazon.com/gp/product/B001FTL8D8/ref=as_li_ss_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B001FTL8D8&linkCode=as2&tag=allset-20 →buy]
[[Category:B1 grammar points]]
{{Basic Grammar|一下子|B1|Subj. + 一下子 + Verb + 了|天气 一下子 变 冷 了 。|grammar point|ASG06EA8}}
{{Used for|Expressing duration}}
{{Used for|Describing actions}}
{{POS|Adverbs}}