考試近在咫尺了，考生們是否已經準備好考試了呢？考試前的複習是很重要的哦，下面是小編為大家準備的`考試實用的複習練習題，希望能夠幫助大家高效複習，這裡先預祝考生們考試順利。
happen是不及物動詞，它的用法常見的有如下幾種情況：
1. 表示“某地(某時)發生了什麼事”，常用“sth.+ happen +地點/時間”這一結構來表達，此時主語應是事情。例如：
The story happened in 2003. 這個故事發生在2003年。
An accident happened in that street. 那條街上發生了一起事故。
2. 表示“某人出了某事(常指不好的事)”，要用“sth.+ happen+to sb.”這一結構來表達。例如：
A car accident happened to her this morning. 今天上午她發生了交通事故。
What happened to you? 你怎麼啦?
3. 表示“某人碰巧做某事”，要用“sb.+ happen+ to do sth.”這一結構來表達。例如：
I happened to meet a friend of mine in the street yesterday. 昨天我碰巧在街上遇到了我的一個朋友。
4. happen表示“碰巧或恰巧發生某事”時，還可用“It happens / happened that...”這一結構來表達。例如：
It happened that Brian and Peter were at home that day. 碰巧那天布萊恩和彼得在家了。
It happened that he had to take part in a meeting that afternoon. 碰巧那天下午他不得不參加一個會議。
注：that從句中的主語是人時，此種結構可以與“sb.+ happen + to do sth.”結構互換。例如：
It happened that Brian and Peter were at home that day. = Brian and Peter happened to be at home that day.
