Student or Learner
rules about these ??????
Welcome to the fórum, sarabajrami.
Your "question" leaves a great deal to be desired. It does not qualify as a sentence in English as it contains neither a subject nor a predicate. Furthermore, all sentences are completed using only one punctuation mark.
Have you tried to use Google? You can start here. http://www.englishpage.com/verbpage/...ontinuous.html