He left the letter on the table in order that I might see it.

目的状语从句，说明是一种将来的动作行为。由于带有不确定性，故一般跟情态动词连用，表示可能性。引导目的状语从句的连词或词组连词，主要有：

so, so that, in order that, for fear that, in case (that), for the purpose that, lest 等。

从句中常用情态动词 can, could, may, might, would，should 等。

in order that, so that 引导目的状语从句（最常用），举例：

I hurried through my work in order that I could be in time for wonderful TV programmes.

我匆匆地完成了我的作业以便能够赶上精彩的电视节目。

Come closeer in order that you may see the screen better.

靠近一些，以便你能更清楚地看到屏幕。

I'll speak slowly so that you can understand me.

我会说得慢些，以便你能明白我的意思。

I took a taxi so that I would be in time for the appointment.

我坐出租车去，以便及时赶上约会。