在学习英语六级的过程中，我们常遇到only与其它词或结构搭配来表达不同的意思，现将这些用法示例分享给大家，大家可以作为参考。

一、only引导的'词组或句子放在句首作状语时，通常要用倒装结构。

如　　Only in this way can you solve the problem.　　只有通过这种方式你才能解决问题。

Only if you study hard can you pass the exam.　　只有努力学习才能通过考试。

Only then did I realize my mistake.　　只有那时我才意识到错了。

二、not only...(but also)出现在句首时，如果架连接的是两个句子，常用倒装。

如　　Not only did we lose all our money,but we also came close to losing our lives.　　我们不仅丢了钱，还差点把命丢了。

Not only did he speak correctly,but he also spoke easily.　　他不仅说得准确，而且说得很轻松。

三、only放在不定式前面，常表示不愉快或出乎人们的意料的结果。

如　　I went all the way to his home only to find hime out at a meeting.　　我径直到他家里去，不料发现他出去开会了。

I hurried to the post office only to find it closed.　　我匆忙赶到邮局，不料已经关门了。

She went home only to find her house burglarized.　　她回到家里，发现房子被盗了。

四、“too...to...”结构中，表示否定意思，但在“only too...to...”结构中，only too = very，表示肯定意思。

如　　The patient is too weak to walk.　　那个病人太虚弱了，走不动。

We are only too willing to do it for you.　　我们非常愿意为你做那事。

I am only too delighted to accept your king invitation.　　我非常高兴地接受你的邀请。

五、在“one of + 复数名词 + 定语从句”的结构中，定语从句一般被看作修饰复数名词，谓语要用复数形式。

但在“the only one of + 复数名词 + 定语从句”的结构中，定语从句却被看作修饰“the only one”，谓语动词要用单数形式。

如　　This is one of the best novels that have been published in the past two years.　　这是近两年出版的最好的小说之一。

He was the only one of the boys who was given a prize.　　他是这些孩子中唯一受到奖励的。

She is the only one of the girls who has been to the US.　　她是那些女孩中唯一去过美国的。

六、If only 为虚拟语气的一种，表示愿望或一个未实现的条件，多用于感叹句，其主句常常省略。

如　　If only she would marry me!　　她要是能和我结婚该多好!　　If only he had known about it!　　他那时要是知道这件事该多好!　　If only you could have been here earlier that day!　　要是你那天再早点到这就好了。

If only there were forty-eighty hours in a day.　　要是一天有48个小时就好了。

以上就是大学英语六级语法常考知识，希望可以给大家备考带来帮助。