1.We left the day that he arrived.
2.Xin Sheng was born in 1949, the year that the People’s Republic of China was founded.
3. John stayed until just that we came.
4. We spent our time as happily as possible, till about half a year ago, that my ill stars directed me to.
请问老师，句1）和句2） that 引导的时间定语从句；句3）和 句4）引导的是时间状语从句，是如此吗？判断that和when引导的是时间定语从句还是时间状语从句的依据是看它们之前有无先行词，比如句1）和2）中that的先行词the day 和 the year。 是如此吗？
依据摘抄例句的文章解说，句1）和句2）中连词that可等于when。句3) just that 等于just when; 句4) 的that等于when that。我有一点不知道想请问老师，句4）中的that 为何等于when that 而不是直接等于when呢？
以上资料摘自谢庆芳发表的《简单连词that引导的状语从句》
谢谢老师！
We left the day that he arrived.
时间定语从句的说法不规范，应该说定语从句修饰时间名词。在早起英语非正式语体中，that可以是关系副词引导定语从句，修饰时间名词，money及货币名字，地址名次place，方法名词way, 与缘由名词reason。因为是非正式语体，这个that还可以省略。如这个句子中的that就能省去。The moment，everytime等引导时间状语从句，其实就是省略了关系副词that。关系副词引导定语从句，分别等于when, where, why和in which.
2.Xin Sheng was born in 1949, the year that the People’s Republic of China was founded.
the year是1949的同位语，关系副词that引导定语从句修饰the year, 等于when。
3. John stayed until just that we came.
until后面可以接when和after等状语从句。这个时候的that从句可以理解为when从句（状语从句），也可以理解that是先行词the time和关系副词that的紧缩形式（可商榷）。
4. We spent our time as happily as possible, till about half a year ago, that my ill stars directed me to.
这个句子的that显然是个关系代词作介词to的宾语，引导非限拟定语从句补充说明half a year ago. 。虽然多数语法书觉得that不可以引导非限制性定语从句，但这不是绝对的。这里就是一个例子。
