When you study a foreign language (or English as a Second Language ) it is common to copy work from books and web-sites to learn expressions, words or idioms. You might also borrow tapes or CDs from the library to practise the pronunciation of words and sentences. Learning idioms or expressions like a parrot is called “rote learning ”.
It is okay to do this for your personal studies when you are learning words, idioms and expressions. However, when you are handing in work for assessment to a teacher, particularly in mainstream courses, you are not allowed to copy material straight from other sources without referencing. If you do this, it is considered to be “plagiarism” and your teacher may ask you to do the assessment piece again or you may get a low mark or even fail the unit.
When you are given a piece of work that will be marked and assessed as part of your course-work, it is best to ask your teacher about the requirements regarding plagiarism. Generally, it is not allowed! However, if you are doing private study and just learning English expressions, words or idioms, it is acceptable to use rote learning as a study method like many of you have always done.