考研英语写信作文通常要求在100-120个单词之间。这个字数范围可以确保考生在有限的时间内充分表达自己的观点，同时又不至于过于冗长。以下是一个参考的作文示例：
Dear [Recipient's Name],
I hope this letter finds you well. I am writing to express my gratitude for your kind support during my recent challenges.
First and foremost, I want to thank you for your unwavering encouragement. Your words of support have been a source of strength for me, helping me to stay motivated and focused on my goals. Your belief in my abilities has been instrumental in my success.
Moreover, I appreciate the time and effort you have invested in helping me improve my skills. Your guidance has been invaluable, and I have learned so much from our discussions. I am confident that these new skills will serve me well in my future endeavors.
In conclusion, I want to express my heartfelt thanks for your support and friendship. Your kindness has touched my heart, and I will never forget the impact you have had on my life.
Once again, thank you from the bottom of my heart.
Warm regards,
[Your Name]
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