汉翻译成英文 一句话

We have prepared so long.It is the right time to set out.

We prepared a long time and set out.

We started out after preparing so long.

We set out after a long time of preparation.

After we prepared for a long time ,we set off.

We've prepared for a long time. And we set off.
p.s:We've是We have的缩写，前面那个我用了现在完成时，后面那句用了过去时。不知道对不对的额。以上纯属个人见解，仅供参考！祝好运！