The structure 到…为止
We can use the structure 到…为止 
to say phrases like: "until now", "up to here" or "thus far".
The structure 到…为止 indicates that an action lasted for a certain period of time and was completed at a certain moment. In a sentence, it can be either an adverbial modifier of time or an adverbial modifier of place.
We can also use this structure to indicate the stage of a process which has not yet been completed.
to say phrases like: "until now", "up to here" or "thus far".
The structure 到…为止 indicates that an action lasted for a certain period of time and was completed at a certain moment. In a sentence, it can be either an adverbial modifier of time or an adverbial modifier of place.
We can also use this structure to indicate the stage of a process which has not yet been completed.Scheme
到
time/place
为止
Examples
到目前为止，他还没有出过什么错
He still hasn't done anything wrong (the situation can change in the future)
dào mùqián wéizhǐ, tā hái méiyǒu chūguò shénme cuò
我的报告到此为止，谢谢！
This is the end of my report. Thank you!
wǒ de bàogào dào cǐ wéizhǐ, xièxie
到昨天为止，这个项目以及该完成了一半
As of yesterday, this project should have been at the halfway point
dào zuótiān wéizhǐ, zhè ge xiàngmù yǐjí gāi wánchéng le yíbàn
Pay attention
The structure 到…为止 is used in written language. It is often used in the news.
We can also use the structure 直到…为止 instead of 到…为止.
instead of 到…为止.Examples
他重复了几遍直到能记住为止
He repeated it several times until he remembered it
tā chóngfù le jǐ biàn zhídào néng jìzhù wéizhǐ
他们为这个项目提供资金，直到2010年为止
They funded this project until 2010
tāmen wèi zhè ge xiàngmù tígōng zījīn, zhídào èr líng yī líng nián wéizhǐ
我不会离开直到她回来为止
I won't leave until she comes back
wǒ bú huì líkāi zhídào tā huílai wéizhǐ