only的几种特殊用法

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。