1.''You should enroll in the college'' said my father (Advised)
-> My father advised me to enroll in the college
2. If she doesn't hurry, she will miss the last train (unless)
-> Unless she hurry, she will miss the last train
3. Work hard or you can't pass the exam (If)
-> If you don't work hard, you can't pass the exam
4.''Where are you working now, Nam?'' said Peter (then)
-> Peter asked Nam where he was working then