Soluzione del esercizio 31 di Performer B1, Vol. 1

PRESENT PERFECT

FORM

Affirmative

• I / You / We / They've (have) won a prize.
• He / She / It has won a prize.

Negative

• I / You / We / They haven't (have not) won a prize.
• He / She / It hasn't (has not) won a prize.

Interrogative

• Have I / you / we / they won a prize?
• Has he / she / it won a prize?

Short answers

• Yes, l / you / we / they have.
• Yes, he / she / it has.
• No. I / you / we / they haven't.
• No, he / she / it hasn't.

USE

• Actions that happened at an unspecified time in the past - Example: I have visited that museum.
• Actions that happened in an unfinished period of time - Example: She has worked here for two years.
• Generic information about recent events - Example: They have just released a new album.
• Life experiences - Example: I have traveled to many countries.
• Actions that have happened recently when the result is important in the present - Example: I have lost my keys.
• To say something has happened several times up to now / so far - Example: I have called you three times today.

SIGNAL WORDS

• Already and just in affirmative sentences - Example: She has already finished her homework.
• Ever and yet in interrogative sentences - Example: Have you ever been to Paris?
• Never and not … yet to give negative answers - Example: I have never seen such a movie.
• Recently, lately, so far, up to now once … - Example: I have recently started a new job.