Conjunctions of Reason and Purpose

为

I bought a ticket for the concert this evening.

我买了一张给今晚音乐会的票。

是, 在

Today is her birthday.

今天是她的生日。

鉴于, 由于

Given that it was raining heavily, we decided to postpone the picnic.

鉴于雨下得很大，我们决定推迟野餐。

以便，为了

She studied hard so that she could pass the exam.

她努力学习以便能通过考试。

什么时候, 何时

Can you let me know when the package arrives?

你能告诉我包裹什么时候到吗？

以免, 为了避免

She covered the plants with plastic, lest they freeze in the cold weather.

她用塑料盖住了植物，以免它们在寒冷的天气里冻结。

现在, 目前

I am cooking dinner now, but we can watch a movie after dinner.

我现在在做晚饭，但我们可以晚饭后看电影。

以便, 为了

I left a note on the door in order that you would know I stopped by your house.

我在门上留了张纸条以便你知道我来过你家。

He refused the invitation on the grounds that he was too busy.

假设, 基于假设

We proceeded with the project on the assumption that the funding would be approved.

我们假设资金会得到批准，于是继续了这个项目。