that 和which在定語從句中都是做關系代詞,指代先行詞是事物的名詞或代詞（that還可以指代人,which 不可以）.通常情況下二者可以互換.
區(qū)別：
關系代詞用that（不用which）的情況：
1.先行詞是all,anything,everything,nothing等,關系代詞應用that
That's all that he told me.
2.先行詞前有the only,the same,the very 或no,little,much,any,every,all 等修飾時,關系代詞應用that
She is the only person that I know in this company.
3.先行詞前有序數(shù)詞或形容詞最高級修飾時,關系代詞常用that
The first thing that I want to do is to take it away.
4.當先行詞同時含有"人"或"物"時,關系代詞應用that
5.在固定結構the same...that...; so...that...; such...that...以及it is/was...that...的強調句型中,要用that
This is the same park that we once visited.
6.如主句以there be開頭時,關系代詞應用that
There is a room that has two windows.你還沒回答我【stolen】什么意思呢，(⊙v⊙)嗯stolen 是steal 的過去完成時， |“偷竊”的意思、這個沒有看到哈