Презентация, доклад : Presenr Perfect Средняя школа

verb have (have/has) and the past participle of a main verb:


I have traveled to the USA once.

Auxiliary Past participle of travel

present:

They’ve been married for nearly fifty years. (They are still married)

They were married for nearly fifty years. (Simple past. They are not married anymore)

She has lived in Liverpool all her life. (She still lives there).
She lived in Liverpool all her life. (She probably died).

the time of speaking:

I can’t get in the house. I’ve lost my keys.

Teresa isn’t at home. I think she has gone shopping.

But when someone has not returned we use have/has gone:

A: Have you ever been to San Francisco?
B: No, but I’ve been to Los Angeles.

A: Where is Maria? I haven’t seen her since last weekend. 
B: She's gone to Paris. She’ll be back tomorrow.

recently) which refer to the recent past:

Scientists have recently discovered a new breed of monkey. 
We have just gotten back from our holidays.

haven’t been to Paris. (In my life) Mom’s phoned me only once this week.

I have already sailed a boat / I have never sailed a boat