請問為什么這兩句話,1句是名詞性從句（noun clause）,而一句是定語從句（relative clause）?
1.The party [which Pat said that Chris was going to this weekend ] is at Sandy's 這句中[which Pat said that Chris was going to this weekend ] 是relative clause.
2.The man [sitting at the desk] is the clerk.
這句中sitting at the desk 是noun clause
3.The fact [that he didn't attend] has everybody puzzled.
這句中that he didn't attend是noun clause.
第2句中sitting at the desk所擔當?shù)某煞趾土硗鈨删溆惺裁床煌?它也有先行詞阿,難道這部應(yīng)該是定語從句嗎?