从句包含关系词在内吗?比如：Iknowthemanwhoissittingonthegrass.它的从句是whoissittingonthegrass还是issittingonthegrass还是随便?

Question

从句包含关系词在内吗?
比如：I know the man who is sitting on the grass.
它的从句是who is sitting on the grass 还是is sitting on the grass 还是随便?

Answer 1

从句当然是who is sitting on the grass ,who在定语从句中作is sitting 的主语.定语从句必须是一个完整的句子,至少要有主谓结构.定语从句由关系代词或关系副词引导,从句一般包含关系代词或关系副词在内,只有当关系代词在定语从句中作宾语时,才可以省略关系代词.
She is the girl (whom )we met in the street yesterday .