Present Perfect Simple

PRESENT PERFECT SIMPLE
We use present pefect simple to talk about past actions that they result in the present

Present perfect is formed by the auxiliary "have" conjugated and the past participle
 * CONJUGATION
 * USE
 * 1) Actions when the result is in the present and the exact time isn't important
 * 2) A period of time that began in the past and has a result in the present
 * 3) Questions asking How Long?    -How long have you wanted to become a doctor?
 * 4) With for to talk about a period of time   -I've been here for a week
 * 5) With since to talk about an action started on a date that continues now  -You've worked here since 2010
 * 6) Questions with ever   -Have you ever travelled to England?