Even though I am very busy I must send you a message.
虽然我很忙我得发短信你。
Please correct my trandlation.

谢谢。

Question

Even though I am very busy I must send  you  a message.
虽然我很忙我得发短信你。
Please correct my trandlation.

谢谢。

Answer

I think "must" implies internal motivation, rather than external requirement. So I would suggest "尽管我很忙，但我还是要给你发条短信。“

Answer

虽然/即使/尽管我很忙，我还是得发短信给你。

Answer

Or 尽管我很忙，我还是得给你发短信。

Answer

虽然我很忙，但是我还是得给你发短信