Present perfect

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Present perfect by Mind Map: Present perfect

1. The research has shown that social networking and online learning environments are able to help shy people.

2. Connections provided by social networks have proven to be beneficial.

3. Have connections proven to be beneficial?

4. Has the research shown that social networking.....?

5. The research hasn`t shown that social networking....

5.1. Negative

6. connections provided by social networks haven`t proven to be beneficial.

7. Form

8. has/have+V ed(V3)

9. Interrogative

10. Use

11. life experience, new information,

12. unspecified action before now,result in the present

13. Adverbs

14. yet

15. never

16. already

17. just

18. ever

19. recently

20. lately

21. Negative