Did not understand what you want us to do. At least put up a question or a request in the title to let us know. anyway, I am assuming that you want these corrected, so here it is : (Only correcting the wrong ones)
I have been swimming everyday since 1980
He was a christian when he was a child ( means he may not be a christian anymore)
Has your brother lived here long？
OR Has you brother been living here long ?
He has been learning to play the piano since long
I had written three letters for him，but he didn`t reply
OR I wrote three letters ....
I drove this car three years ago
I drove this car for three years
He has taught English for a long time
I have seen "Gone with the Wind"
I have had a meal
I will keep loving you my entire life