The document discusses how to form questions and sentences in the present perfect tense in English. It provides examples of yes/no questions using subjects like "he", "she" and "they" with the verbs "have" and "eaten" or "cooked". It then explains that the present perfect tense uses "has/have" plus the past participle to express an action that occurred at an unspecified time before now or an unfinished period of time. Links are provided for additional exercises on the present perfect tense.

4. Angêla Betancourt

5. Friday, August 5, 2011 Lesson 10. Have you ever ridden a camel?

7. How to form a sentence ?

8. Has he eaten his dinner? Yes, he has. No, he has not. Has she cooked the meal? Yes, she has . No, she has not. Have they played together? Yes, they have . No, they have not.

9. He / Has + Past Participle Action that happened at an unspecified time before now Ex. He has written a letter to Gloria. (it does not give you the exact date of when he wrote the letter) Expresses an unfinished period of time Ex. My family has visited the doctor several times already this year. (There may be more visits to the doctor)

10. How to form a question ?

11. http://www.ego4u.com/en/cram-up/grammar/present-perfect-simple/exercises?04

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

13. http://www.ego4u.com/en/cram-up/grammar/present-perfect-simple/exercises?05