F. The Present Perfect is formed from the present tense of the verb ‘have’ and the ‘past participle’ of a verb: The present perfect simple is have/ has + past participle.
F1. We use the Present Perfect tense:
a. for something that started in the past and continues in the present. (e.g. They’ve been married for nearly fifty years. Have you ever eaten caviar? (in your life))
b. for something we have done several times in the past and continue to do. (e.g. I’ve played the guitar ever since I was a teenager.)
c. We often use the adverb ‘ever’ (‘never’ for the negative form) to talk about experience up to the present. (e.g. My last birthday was the worst day I have ever had. Have you ever met George?)
d. for something that happened in the past but is important at the time of speaking. (e.g. I can’t get in the house. I’ve lost my keys.)
e. It's the (first) time something has happened. (e.g. It's the first time he has driven a car. (not drives) or He hasn't never driven a car before)
f. when someone has gone to a place and returned. (e.g. A: Where have you been? B: I’ve just been out to the supermarket.) But when someone has not returned we use have/has gone. (e.g. A: Where is Maria? I haven’t seen her for weeks. B: She's gone to Paris for a week. She’ll be back tomorrow.)
g. Been (to) = visited (e.g. I've never been to China. Have you been there?)
Idiom 365
Cry Wolf: To raise an false alarm intentionally, to ask for assistance when you don't need it actually
Example: If you cry wolf too often, family and friends will stop believing you.