好，以下是一些表达方式：
1. I regret to inform you that I ha ve decided to resign from my position.
很遗憾地告诉您，我决定辞去我的职位。
2. I ha ve made the difficult decision to resign from my current position.
我做出了艰难的决定，辞去我目前的职位。
3. After careful consideration, I ha ve decided to tender my resignation.
经过仔细考虑，我决定提出辞职。
4. I would like to inform you that I am resigning from my position, effective immediately.
我想通知您，我立即辞去我的职位。
5. I ha ve decided to move on to new opportunities and therefore, I am resigning from my current role.
我已经决定迎接新的机遇，因此我要辞去目前的职位。