"inorderto"和"inorderthat"都用于表示目的，但它们的用法和结构有所不同：

inorderto

结构：in order to后面接动词原形，形成"in order to do"的结构。

用法：通常用于句首或句中，表示目的或意图。

例句：

We need to gather all the information in order to complete the project.

She studied hard in order to pass the exam.

inorderthat

结构：in order that后面接一个完整的句子，形成"in order that + 句子"的结构。

用法：用于引导目的状语从句，说明某个行为或情况的目的。

例句：

They arrived early in order that they could find good seats.

He bought a car in order that he could travel more easily.

总结：

"inorderto"用于表示目的，后面接动词原形，通常用于句首或句中。

"inorderthat"用于引导目的状语从句，后面接一个完整的句子。