happen / take place / occur / come about / break out 意为“发生”

1. happen 表示“发生，碰巧”，一般用于偶然或突发性事件。常用的结构是：It happens that...和happen to do sth，分别意为“碰巧...”“碰巧做某事”。

2. take place 表示“发生，举行，举办”，一般指非偶然性事件，即这种事件的发生一定有某种原因或事先的安排。

3. occur 作“发生，想到，突然想起”解，其意义相当于happen。常用结构有sth occurs to sb/it occurs to sb that...“某人突然想起...”。

4. come about 表示“发生，产生”，多指事情已经发生了，但还不知道为什么，常用于疑问句和否定句。

5. break out 意为“发生，爆发”，常指战争、灾难、疾病或者争吵等事件的发生，也可以表示突然大声喊叫等。

全部

1·That doesn't happen very often.

那不常发生。《柯林斯英汉双解大词典》

2·This must never happen again.

这种事再也不能发生了。《牛津词典》

3·How on earth did that happen?

那到底是怎么发生的？《柯林斯英汉双解大词典》

4·We didn't want this to happen.

我们并不希望发生这样的事情。《牛津词典》

5·An accident can happen anywhere.

任何地方都可能发生事故。《牛津词典》

6·Nobody knows what will happen next.

没有人知道接下来将会发生什么事。《牛津词典》

7·He wondered idly what would happen.

他漫不经心地幻想着会发生什么事。《牛津词典》

8·When did this supposed accident happen?

这场所谓的事故发生在什么时候？《牛津词典》

9·Who can say what will happen next year?

谁能说得出明年会发生什么事？《牛津词典》

10·We cannot say for sure what will happen.

我们说不准将会发生些什么。《柯林斯英汉双解大词典》

发生

1·How on earth did that happen?

那到底是怎么发生的？《柯林斯英汉双解大词典》

2·An accident can happen anywhere.

任何地方都可能发生事故。《牛津词典》

3·That doesn't happen very often.

那不常发生。《柯林斯英汉双解大词典》

4·This must never happen again.

这种事再也不能发生了。《牛津词典》

5·We cannot say for sure what will happen.

我们说不准将会发生些什么。《柯林斯英汉双解大词典》

碰巧

1·At first it may have been grains or pebbles but now it is a memorised sequence of words that happen to be the names of the numbers.

一开始它可能是谷物或鹅卵石，但现在它碰巧是一个数字名称的记忆单词序列。

2·The center's Shop with Your Doc program sends doctors to the grocery store to meet with any patients who sign up for the service, plus any other shoppers who happen to be around with questions.

该中心的“与你的医生一起购物”计划将医生派到杂货店，与注册该服务的病人见面，碰巧在附近的想问问题的顾客也能与医生会面。

3·Most of the participants are people who are just walking by or are on the island for other reasons, or they just kind of happen to be there, Alexandra Chasin, a artistic director, tells Smithsonian.

一名艺术总监亚历山德拉·查辛对史密森尼说：“大多数参与者都是那些只是路过的人或是因为其他原因来到岛上的人，或者他们只是碰巧在那里。”

4·Sometimes, they happen to see the orbits of exoplanets edge-on. In those cases, the planet alternately shows more of its dayside and then more of its nightside as it circles its star.

有时，天文学家们碰巧从侧面观察到系外行星的轨道，在这种情况下，行星在围绕恒星旋转的时候就会交替地呈现出有时光面较多、有时暗面较多。

5·In short, unless you happen to have the VML library just lying around, you can't possibly implement this.

简言之，除非您碰巧使用了vml库，否则不可能实现这个要求。

恰巧

1·Now let’s consider the upside situation where you happen to be in a super hot space.

现在让我们考虑一下，情况上升时的情形，而你恰巧在一个很被看好的位置。

2·Now let's consider the upside situation where you happen to be in a super hot space.

现在让我们考虑一下，情况上升时的情形，而你恰巧在一个很被看好的位置。

3·If you're a Firefox fan and you happen to be in the middle of a long Thanksgiving weekend, you can take advantage of some new updates.

如果你是一个火狐粉并且你恰巧在长长的感恩节周末中，你可以享受到一些新的更新。

4·Twist is designed around the idea that well-abstracted test scenarios, which happen to be both semantically meaningful and declarative, can help you with test maintenance.

Twist的设计可以很好地抽象测试场景，恰巧既在语义上有意义，也具有说明性，可以帮助你维护测试。

5·Because we've said all along that it's about whatever it is that we happen to be talking about, let's think about Tony once again as being about the things we've been discussing recently.

因为我们讲过它与所有，我们恰巧讲到的东西有关，让我们再次想想托尼，把它与我们最近讨论的东西联系起来。

(1)happen to be碰巧是；恰巧是

(1)as it happens碰巧；偶然发生

(1)happen on偶然遇到或发现

(1)happen to meet偶然遇见

(1)happen to coincide不约而同；不谋而合