The ellipsis, those three consecutive periods you often see in novels and news stories, is among the most misunderstood punctuation marks in use in the English language. It is used indiscriminately in text messages, instant messages, and emails, and social networking websites and blogs haven't helped to curb the trend. However, the ellipsis is an actual punctuation mark that serves a particular use, in both formal and informal styles of writing. If using ellipses confuses you, try following some of these simple guidelines as to when ellipses should be used – and when they should not.
Present perfect tense combines the present tense and the perfect aspect used to express an event that happened in the past that has present consequences. This tense is used to show a link between the present and past and is commonly used in everyday conversations, in the news, on the radio, and when writing letters.