1. Because he didn't want to hurt her feelings, he didn't tell her the bad news.
2. Because the little boy believed that no one would ever let him stay away from home.
3. Because he has already dropped out of school once, he tried to succeed this time.
4. Because she is a vegetarian, she does not eat meat.

Because he didn't want to hurt her feelings, he didn't tell her the bad news.
   * Chuyển thành: Not wanting to hurt her feelings, he didn't tell her the bad news. (Sử dụng phân từ hiện tại)
 * Because the little boy believed that no one loved him, he ran away from home.
   * Chuyển thành: Believing that no one loved him, the little boy ran away from home. (Sử dụng phân từ hiện tại)
 * Because he has already dropped out of school once, he tried to succeed this time.
   * Chuyển thành: Having already dropped out of school once, he tried to succeed this time. (Sử dụng phân từ hoàn thành)
 * Because I had forgotten to bring a pencil to the examination, I had to borrow one.
   * Chuyển thành: Having forgotten to bring a pencil to the examination, I had to borrow one. (Sử dụng phân từ hoàn thành)
 * Because she is a vegetarian, she does not eat meat.
   * Chuyển thành: Being a vegetarian, she does not eat meat. (Sử dụng phân từ hiện tại)