You only have to.. . in order to....

这是一个表示条件的句型，意思是"要想......，只要先......就行了"。

支持范例
1. You only have to call her in order to know whether she will come or not.
你只要打个电话就知道她是否会来了。
2. I only have to ask the teacher in order to solve the problem.
我只要去问问老师就能解决这个问题了。
3. You only have to get some newspapers in order to find the ads you need.
你只要买一些报纸就能找到你需要的广告了。

会话记忆
A: Have you started your report yet?
你开始写报告了吗？
B: I'm having a hard time getting the information.
我现在很难搜集信息。
A: It's easy. You only have to search the internet in order to get the information you're looking for.
这很容易。你只要上网查你需要的信息就行。
B: Oh, I didn't think of that.
噢，我忘了这一点了。