Grammar · Chapter 60
以致 and 以至于: so much so that it went wrong
A 太 …，以致 B · 以至于 B
以致 links a cause to a bad result: 他沉迷游戏，以致考试不及格. 以至于 adds the degree, 'so much so that': 她太紧张，以至于忘了内容. What follows 以致 is almost always bad — for a good outcome there are other words. The mistake is confusing it with 以便: 以便 states a purpose ('so that'), not a consequence.
Examples
- 他沉迷游戏，以致期末考试不及格。 Tā chénmí yóuxì, yǐzhì qīmò kǎoshì bù jígé. He got so absorbed in video games that he failed his final exam.
- 她演讲时太紧张，以至于忘记了重要的内容。 Tā yǎnjiǎng shí tài jǐnzhāng, yǐzhìyú wàngjìle zhòngyào de nèiróng. She was so nervous during her speech that she forgot the important parts.
- 他一时糊涂，以致丢了工作。 Tā yìshí hútu, yǐzhì diū le gōngzuò. In a moment of confusion he lost his job.