我不敢这么早出发（翻译成英语）

I dare not off so early
I don't dare to set off so early
set out 或set off
都可以
dare在第一个句子是情态动词在第二句中是实意动词

I do not want to so early departure

偶试试
I dare not to set out so early

i dare not leave so early

I do not dare such early to embark

I'm afraid i can't set out so early