组成的英语单词是only，意思是仅仅，只有，例如：

1、There's only one sure way to do it.做这件事只有一个保险的办法。

2、There were only three of us on the advanced course.只有我们三人学高级课程。

3、Only time will tell if the treatment has been successful.只有时间才能证明这种疗法是否成功。