had letter,stay,ill,for these days,water用关键词写一篇文章,

I had a letter for my brother,I wrote for three days.When my brither read it,he was very sad.Because I wanted to seimming with him but he was ill in home,he had to stay at home!
It's a very bad thing.I gave some advice for him,I thought he should drink lots of water for these days.I only can do this.I hope he can feel better.
虽然回答得有点不及时,但还是希望能够帮到你的忙,如果有用的话就请采纳我,这是我自己想的,