If that is the case, we need more staff.
如果真是那样，那我们就需要更多的'员工了。
If that's what you think, you're way off base.
你如果那么想就全错了。
I'd rather email than phone, if that's OK by you.
如果你认为可以的话，我想发电邮而不打电话。
I could cook your supper, though, if that would help.
不过我可以给你做晚饭，如果这样能帮到你的话。
The President said he was willing to stand aside if that would stop the killing.
总统说，如果他下台能让杀戮停止的话，他愿意这样做。