汉译英：不管天有多黑，我都要早点出发

No matter how dark it would be, I will be leaving early.

因为是还没发生的事情，no matter后面要用虚拟时态，would be

no matter how dark it will be, i am leaving early.

No matter how dark the day is, I will have to start off early.

No matter how dark it is, I am leaving early.

No matter how dark it is, i will set off early.

No matter how dark the weather is，we need start off as early as possible.