Present perfect
by vika 1995
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
