As far as 可以限定某个范围，例如 as far as I know 是据我所知，承认了解的情况可能不完整。描述距离时，as far as the station 表示一直到车站。与 is concerned 搭配时，表示就某方面而言，可在作文或商务信件中引出一个话题。
想在对话中用 as far as 吗？
写一句英语，查看错误和更自然的表达建议。
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as far as I know/remember/can see; as far as + noun + is/are concerned; as far as + place
- As far as I know, the library is closed on public holidays.
- As far as public transport is concerned, the city has improved a lot in recent years.
- We walked as far as the old lighthouse and then took a taxi back.
修改原因
修改前As far as the price, it is quite reasonable for a four-star hotel.
修改后As far as the price is concerned, it is quite reasonable for a four-star hotel.
容易写完 as far as the price 就停下。但要表达就价格而言，需要完整结构：as far as the price is concerned，或 as far as the price goes。因此修改补上 is concerned。想写得简短，可以用 as for：As for the price, it is quite reasonable。
As long as 的意思不同，是只要、条件是：You can borrow my bike as long as you bring it back by Sunday。二者开头相似，容易混淆，但据我所知不能说成 as long as I know。作文中 as far as I am concerned 可以表示在我看来；不过每段都这样开头显得重复，简洁的 In my view 也能表达相同意思。
动手练习
___ I know, the museum is closed on Mondays, so let's go on Tuesday instead.
查看答案
As far as — 说话者依据目前了解的情况判断，并非完全确定，因此用 As far as I know。As long as 引出条件，不符合这里的 I know。
点评一次住过的酒店或公寓。用 as far as … is concerned 评价一个方面，例如位置或噪声，并说明理由。
As far as the location is concerned, the flat was perfect: the metro was two minutes away and there was a park across the road.
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