做好这份工作英文

I will go this job well.

I will be responsible to do my job

I will try my best to do the issue of responsibility well (try one's to do sth.)i will do as hard as i can to finish the issue of responsibility well (do as hard as sb. can)it is certain that i will devote myself to doing the issue of responsibility (it is certain + that clause)i do will try my best to do the issue of responsibility well (强调句）（本职工作我翻译为the issue of responsibility ，如果你觉得不合适或者不符合语境可以用 take responsibility to do sth 来说）

I have confidence to do that job

I'll do my job as much as I can.