1. She grudges such a stupid fellow his manor house 這句不可以改成She grudges such a stupid "fellow's" manor...
算是插入語或是介詞片語? Both! It is a prepositional phrase and uses as an adjective to supplementally describe "Mr. Jones".
...interest in mathematical research. Isaac Newton was born in the manor house of Woolsthorpe, near Grantham in Lincolnshire. ...