THE PRESENT PERFECT

Affirmative sentences:

We use the auxiliary “have” (“has“ for the 3rd person singular) + the past participle of the verb.

e.g. They have been to China.

FORM

Negative sentences:

We use the auxiliary “have” (“has“ for the 3rd person singular) + not + the past participle of the verb.

e.g. They have not been to China.

Questions:

We use the auxiliary “have” (“has“ for the 3rd person singular) + the past participle of the verb. And we also change the word order to subject + have/has+ past participle

e.g. Have they been to China?

USEWe use the Present Perfect Tense to talk about experiences. It is important if we have done it in our lives or not. It is not important when we did it.Examples    I have been abroad two times.    Anna has never broken a leg.    Have you ever eaten sushi? Tip! We often use never and ever with the Present Perfect Tense to talk about experience.

We use the Present Perfect Tense to talk about an action which started in the past and continuous up to now.Examples    I have been a teacher for more than ten years.    We haven't seen Janine since Friday.    How long have you been at this school? Tip! We often use since and for to say how long the action has lasted.

We also use the Present Perfect Tense to talk about a past action that has the result in the present.Examples    I have lost my wallet. = I don't have it now.    Jimmy has gone to South America. = He isn't here now.    Have you finished your homework? = Is your homework ready? Tip! We often use just, already and yet with the Present Perfect Tense for an action in the past with the result in the present.

1. She _______________ to her parents many times about this subject.

a. spoken b. have spoken c. has spoken d. has spoke  2. _________________________ well last night? a. Did she slept b. Did she sleep c. Has she slept d. Has she sleep  3. He is very tired because he _____________________ since 8 am. a. didn't sat down b. hasn't sit down c. didn't sit down d. hasn't sat down

4. He ________________________ when he was younger. a. have sung b. has sung c. sings d. sang  5. _____________________________a plane? a. Has he flew b. Has he flown c. Did he flew d. Did he fly  6. They ________________________ to Salalah. They took a taxi. a. hasn't driven b. didn't drove c. didn't drive d. hasn't drove  

7. She ________________________ a lot yesterday. a. has cried b. cryed c. cried d. has cryed  8. She ________________________ in a long time. a. hasn't cooked b. didn't cook c. hasn't cook d. didn't cooked

http://www.ego4u.com/en/cram-up/grammar/present-perfect-simple

http://www.englisch-hilfen.de/en/grammar/pres_perf.htm

http://esl.about.com/library/grammar/blpresperfect.htm

http://www.isabelperez.com/happy/tenses/pres_perfect.htm

http://www.englishclub.com/grammar/verb-tenses_present-perfect_quiz.htm

http://www.better-english.com/grammar/presentperfect1.htm

http://www.clafoti.com/imagenes11/pres_perf.htm