Dear teasher,
i am writing to express my love to you .as you know ,my english isn't very good but i still want to express my love to you in my poor english .i think this is the best wayfor me to respect you before you leave .at this time time i have no word in my mind,i don't know what i should say or do to you .my dear teacher ,i sincerity wishes you can happy every day even if without us.i will miss you for ever.
你可以根据自己的实际在修改一下