原文：
When she thought it over afterwards, it occurred to her that she ought to have wondered at this, but at the time it all seemed quite natural.
虽然过了一段时间以后她认为这件事应该奇怪，可当时她的确感到很自然。
1.occur to sb
(of an idea or a thought 观念或想法) 被想到；出现在头脑中；认为，想起，想到；某事发生早某人身上（尤指不好的事情）
to come into your mind；come to mind of (sb/sth)
The idea occurred to him in a dream.
这个主意是他在梦中想到的。
The same idea had occurred to Elizabeth.
伊丽莎白也想到了这个主意。
This idea never occurred to me.
我万万没有想到。
I hope no accident has occurred to him.
我希望他没出什么事。
Such a simple explanation never occurred to me!
我从未想到如此简单的解释。
It never occurs to them to question the doctor's decisions.
他们从未想过要怀疑医生的决定。
A wonderful idea occurred to him.
他突然想到一个妙主意。
His name did not occur to my memory.
我当时没有想起他的名字。
As soon as that thought occurred to him, he felt worse.
一想到那一点,他的心情就变糟。
It occurred to my mind.
我当时想到了这件事。
His name did not occur to my memory.
我当时没有想起他的名字。
He was unconscious and as I looked at his face, something occurred to me ．
他昏了过去，我看着他的脸庞想到了一些事情。
高考真题- 2018 全国2卷 完形填空
2. It ～s/ed+to sb+to-v/that-clause想到，想起
1）. [+ to inf]想到，想起
It did not occur to me to check my insurance policy...
我没有想到要核实我的保险单条款。
It didn't occur to her to ask for help.
她没想到请别人帮忙。
It occurred to me to see her in the hospital.
我突然想到去医院看她。
Didn't it occur to you to close the window?
难道你没有想到去关窗户吗?
Didn't it occur to you to phone them about it?
关于这件事你难道就没想到给他们打个电话?
It occurred to him to tell the colonel of the problem.
他想起要告诉上校那个问题。
It never occurred to me not to endeavor to do so; I was politically minded by nature.
我从来没有想到过要打退堂鼓,我天生就是搞政治的。
Mr King asked if it had ever occurred to her to make provision for her own pension.
金先生问她是否曾想过要为自己的养老金预先作安排。
It wouldn't have occurred to me to get myself a bachelor pad.
否则我不会想到给自己找一套单身公寓。
I don't suppose it occurred to you to notify the police.
我看你没想过要去通知警察。
It occurred to Tom to wonder whether Jane was quite trustworthy. Not that he thought she was in any way politically active.
汤姆突然想到简是不是值得信任，并不是说他认为简有些热衷于政治。
It seldom occurred to them to wander a bit, to take a moment to see what's around them ．
他们很少想到去游荡,花点时间看看周围的事物。高考真题- 2018 天津 阅读D
Though, as children, we thought this was crazy, it would never have occurred to us to deny Papa a request.
尽管作为孩子，我们觉得这是疯狂的，我们永远不会拒绝爸爸的请求。高考真题- 2015 福建 阅读B
2）.[+ that] 想到，想起
It didn't occur to him that his wife was having an affair.
他没有想到自己的妻子有婚外情。
It occurred to me that I could have the book sent to me.
我想到可以让人把书寄给我。
It occurs to me that example is always more efficacious than precept.
我想到身教重于言教。
Has it ever occurred to you that this old book might be of great value?
你想到没有,这本旧书或许有很大的价值?
It never occurs to me that he was only acting a part.
我从来没有想到,他只是在弄虚作假。
It never occurred to me that I had seen her before somewhere.
我想不起来以前我在哪儿见过她。
Did it occur to him that lookers-on see most of the game?
他可曾想到旁观者清吗?
It occurred to me that I had left the door unlocked.
我忽然想起来忘了锁门了。
It occurred to her that she might adopt a homeless child.
她可能想收养一个无家可归的孩子。
It occurred to him that he hadn't eaten anything since the night before.
他想起他自前天晚上以来一点东西没吃。
It never occurred to me for a moment you meant that.
我一点儿也没想到你是这个意思。
It's never occurred to me that the intended victim of the fire was Margaret.
我从未想过这把火竟然是冲玛格丽特放的。
Didn't it occur to you that he was lying?
你当时没想到他在撒谎吗？
It occurred to me that I had left the door unlocked.
我忽然想起来忘了锁门了。
occur是一般用词，可指某事情偶然发生或者按照计划进行， 在表示具体失去的名词作主语的时候，可与happen换用，但比较正式， 跟to短语时，表示“想到”，而不是“发生”，比如 如说something occurred，意思是某事发生了或出现了，存在：
Something unexpected occurred.
发生了一件出乎意料的事。
Sugar occurs naturally in fruit.
水果天然含糖分。
注意happen 可以表示"发生"的意思,为不及物动词vi ,是"发生",或"偶然发生"的意思. 例如:
How did the accident happen? 这事故是怎样发生的?
If anything happens,please let me know. 有什么事发生,请告诉我. 例如:
I happened to meet him on my way home.我在回家的路上碰巧遇到他. (注:如果happen后接不定式,是"碰巧"的意思.) 注:happen是不及物动词,不用被动语态。