in order that和so that的意思不同、后接詞不同、使用廣泛性不同。in order that的意思是為了、以便、目的在于；so that的意思是因此、以便。in order that的從句中可以使用can、could、may、might、must等情態(tài)動詞；so that后通常接句子。

in order that只能引導目的狀語從句。so that可引導目的狀語從句及結(jié)果狀語從句。

It's best to be as short，clear and factual as possible，in order that there may be no misunderstanding.

為了避免出現(xiàn)誤解，最好盡可能簡短、清晰和實事求是。

She said she wanted tea ready at six so that she could be out by eight.

她說為了八點鐘出門，她想讓茶點在六點鐘準備好。

He is so selfish that his teachers and classmates dislike him intensely.

他很自私，老師和同學都極不喜歡他。