1.The salary of a professor is higher than that of a secretary
->The salary of a secretary is lower than that of professor
2.He felt very miserable,so he looked for someone to share his life with.
->He looked for someone to share his life with because he felt very miserable
3.I didn’t realize how late it was and I didn’t stop studying till after midnight.
-> I didn’t realize how late it was and i went on studying till after midnight
4.When did you start working on the project?
->How long have you worked on the project?
5.He feels sorry that he can’t come to his brother’s wedding.(wished)
-> He wished he could come to his brother’s wedding
6”If I were you,I would no longer spend most of my time chatting on Facebook “,he said.(Advised)
-> He advised me not to spend most of my time chatting on Facebook
7.When did you start searching for some facts in the past?(How)
-> How long have you searched for some facts in the past?
8.My mother no longer cooked for me since I married my wife.(Used)
-> My mother used to cook for me before I married my wife