请帮忙分析下列从句的句子成分,
1.Turkey is a popular dish which people usually eat at christmas.
2.A tasty which people usually eat at Christmans.
3.Light which decorate Christmas trees .
4.A small bird which is brown and red .
5.There was one in the stable where Jesus was born .
1.那第一个句子的先行词是turkey对吗?那先行词是充当主语成分还是宾语成份呢？
2.是A tasty pie which people usually eat at Christmans.呵呵，少打了一个词，这句话的先行词是pie对吗？充当宾语吧？
3.第三句不是定语从句，是这个意思吗？
5.是介词作宾语吗？
这一部分我学的似懂非懂的，很晕，