in that是一种固定搭配，其意为“因为”，与for the reason that,because 同义，可用于引导原因状语从句。如：I’m in a slightly awkward position in that he’s not arriving until the 10th.
that用法1、that用作限定词
that用作限定词是指“较远的人或者物”
eg: Look at that man over there. 瞧那边的那个男子。
I was living with my parents at that time.那时候我跟父母住在一起。
That incident changed their life.那次事故改变了他妈的生活。
2、that作代词用
1）用于指代前面提到过的想法或情形
eg: They said you wanted to talk to me. Why was that?
2）为避免重复前面已提及到的名词
eg：A recession like that of 1973-74 could put one in ten American companies into bankruptcy. 一场想1973到1974年那样的经济衰退会使1/10的美国公司破产。
3）用于识别身份或询问他人身份
eg: That's my wife you were talking to.
3、that引导从句
1）引导定语从句(代替先行词在从句中充当主语或者宾语)
eg: Do you like the book that I lent to you？ 你喜欢我借给你的书吗？
2)引导名词性从句（只起连接作用不充当任何成分）
a. 引导主语从句：
eg: That he passed the driving test made us very happy.
他通过驾 照考试让我们非常开心。
b. 引导宾语从句
eg: I know that he is an intelligent and hard-working boy.
我知道他是一个勤奋又努力的男孩。
c. 引导表语从句
eg: My decision is that all of us are to start at 6 o'clock tomorrow morning.
我的决定是所有人明天上午6点钟出发。
d. 引导同位语从句
eg: I have a feeling that one day we will succeed.
我有一种感受将来有一天我们会成功的。
