that引导的定语从句，that在句中做成份吗？

Question

如题所述

Answer 1

that做从句的主语、宾语或表语

Answer 2

that 在定语丛句中可做主语，宾语（指人或物） 如 I like the boy that swam in the pool yesterday.
I hope the doy can help me (that) I meet yesterday. that 做宾语可省略。