英语翻译

问题描述:

英语翻译

We do not know when an earthquake will occur.

We do not know when an earthquake will occur

We don't know when the earthquake will happen.

We don't know when will come the earthquake.

We've no idea when the earthquake would happen.
(注:因地震还未发生故用虚拟式would而不用will)

We don't know when will the earthquake happen.