1. （发生巨变）since I changed my negative attitude (take)
Great differences took place since I changed my negative attitudes.
2.Eric (生来并没有）with a special talent but he later became a success
Eric was not born with a special talent but he later became a success.
3.I (本可以成功）but I didn't try my best ,so I feel regretful.(make)
I should have made it but I didn't try my best, so I feel regretful.
4.When I went there last year,a new bridge (已在修建）across the river (build)
When I went there last year, a new bridge was being built across the river.
5.The rescue workers and medical staff (被誉为） national heroes (praise)
The rescue workers and medical staff were praised as national heroes.