To My Mother
一旦 yí dàn
Time adverb meaning one day. Also has meaning of “in case”, or presuppose something will happen in a uncertain time.
yí dàn zhōng mĕi fā shēng zhàn zhēng ， shì jiè jīng jì huì yŏu hĕn dà de yĭng xiăng 。
Once the Sino-US war happens, the world economy will have a great impact.
yí dàn tiān qì biàn rè ， zhè jiàn yī fu jiù bù néng chuān le 。
Once the weather gets hot, this dress can’t wear.
再 zài + verb meaning to do something more.
zài zuò liăng gè xiăo shí wŏ men jiù huí jiā 。
Do two hours more then we will go home.
zài chī liăng gè miàn bāo wŏ jiù băo le 。
Eat two more loaves of bread I will be full.
每 mĕi +verb Emphasize the situation with every time something happened.
wŏ mĕi chī yí cì yào jiù găn jué shēn tĭ gèng hăo le .
Every time I take the medicine, my body feels better.
tā mĕi zuò yí cì jiā wù ， zŏng yào bào yuàn jǐ jù 。
Each time she did housework, always complaining about something.
一 yī .... 便（就） biàn （ jiù ） ....
This pattern tells us that as soon as (一, yī) one thing happened, then (就, jiù) another thing happened immediately afterwards. 便 biàn is used in a much formal situation or in written Chinese.
yī fu yì chuān ， jiù chū fā 。
After wear the clothes, then set out.
chūn tiān yí guò wán ， tiān qì biàn rè le 。
After spring finished, the weather will be hot.
突然 tū rán + verb meaning something happened suddenly
tiān kōng tū rán xià qĭ le dà yŭ 。
The sky suddenly began to rain.
tā zĕn me tū rán huái yùn le ？
How suddenly she was pregnant?
is used to indicate something was contrary to expectations, However, it is generally followed by a negative comment. It's also important to point out that 却 què is not a conjunction; it's an adverb. Practically speaking, this means that rather than joining two statements, it goes inside a statement (within the second clause). Specifically, it needs to come after the subject and before the verb. (Note that when you use a conjunction like 但是 dàn shì it comes before the subject! 却 què is different in this respect. Also, rather than replacing 但是 dàn shì, it can work with it to add emphasis.
tā yĭ jīng lăo de shéi yĕ bú rèn shi le ， tā què yì zhí yĕ wàng bù liăo tā 。
She too old to know anybody now, but he has still not forget her.
zhōng guó de dà xué shēng măn jiē dōu shì ， néng shuō liú lì yīng wén de què liáo liáo wú jĭ 。
Chinese college students are filling the streets, however very few of them can speak fluent English.
一天天 yì tiān tiān day by day.
一 yì + reduplicate measure words sentence structure meaning one after another.
hái zi yì tiān tiān de zhăng dà ， zhuăn yăn jiù shí bā suì le 。
Children grow up day by day, blink of an eye they are 18 years old.