How To Fix My English Grammar?

WHEN NATIVE ENGLISH SPEAKERS FIX MY GRAMMAR: "When the North...", "Denis..."?

• I have just finished these Exercises: When the North and South finally LAID down their arms in 1865 at the end of the American Civil War they HAD FOUGHT for over four years and the ...show more

• Answer:

  When the North and South finally LAID down their arms in 1865 at the end of the American Civil War they HAD FOUGHT for over four years and the South, which HAD WON several battles but LOST the war, WAS economically exhausted. It WAS a tragedy that Abraham Lincoln, who HAD LED the North to victory and WAS now ready to be generous to the South, DIDN’T SURVIVE to make the peace. Five days after General Lee SURRENDERED at Appomattox, Lincoln WAS assassinated. Denis IS ALWAYS RINGING me up when I am in the shower or washing my hair. The last time the phone RANG with me in the shower I DIDN’T ANSWER it. I LEARNED later that someone HAD RUNG me up to offer me a job which they then HAD OFFERED to someone else. I JUST TOLD Denis that he MUST BE to blame for the fact that I MISSED a golden opportunity. Peter LIVES in Nodnol, the capital of Mercia. At least, that's where he WAS LIVING when he last WROTE. In his letter he INVITED me to visit him, but as I HAVE HAD no answer to my last two letters I AM WONDERING whether I should go or not. I HAVE ALSO HAD no reply from the consulate about the Mercian visa I APPLIED for two weeks ago. Although I WAS born in Mercia, I no longer HAVE a Mercian passport.