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(1)體裁 :說明文 (2)人稱 :第一人稱 (3)時態(tài) :一般現(xiàn)在時和一般過去時 (4)寫作導圖 : 3. 范文鑒賞 Dear Sam, How time fl ies!It ’ s time for us to say goodbye! You ha ve offered me so much help in my English that I think words to show th anks are far from en ough. I still remem ber three years ago, I had di fficulty in learning E nglish .It was difficult fo r me to memorize so many wo