"sothat"和"so that"都用于引导目的状语从句，表示“以便”或“为了”的意思。它们的用法相似，但"sothat"更正式一些，而"so that"在日常英语中更为常见。

sothat

Can you work it so that we get free tickets？

She worked hard so that everything would be ready in time.

She burned the letters so that her husband would never read them.

so that

I studied Italian so that I would be able to read Dante in the original.

Bend the wire so that it forms a 'V'.

I bored a hole so that the [sentence incomplete].

建议根据具体的语境和所需的正式程度选择合适的词。在正式写作或需要强调目的时，"sothat"可能更合适；在日常生活或非正式写作中，"so that"则更为常见。