以便
So that; in order to (make it easier to)
HSK 5HSK 3.0 · 6
A (action)，以便 + (S) + B (purpose, often with 能/可以)
以便 opens the SECOND clause and says that A is done so that B becomes easier: 请留下您的电话，以便我们及时联系您. It is a written-style word common in notices and instructions. Unlike 为了 (usually in the first clause), 以便 never starts a sentence. The second clause often contains 能, 可以, 更 + verb. Its subject may differ from the first clause and comes after 以便.
HSK 5 gap fills, often alongside 以为, 以及, 以免.
Examples
请留下您的电话号码，以便我们及时联系您。
Please leave your phone number so we can contact you promptly.
他把重要的内容都记了下来，以便复习。
He wrote down all the key points for review.
我们提前一个小时出发，以便早点儿到达机场。
We left an hour early so as to reach the airport sooner.
请提前做好准备，以便会议顺利进行。
Please prepare in advance so the meeting runs smoothly.
Exercises
1.请把材料提前发给大家， 大家准备。
2.Choose the correct sentence:
3. 学好汉语，他去了中国。
4.他把闹钟调早了半小时， 能赶上第一班地铁。