词义
believe /bɪˈliːv/ to feel certain that sth. is true or that sb. is telling you the truth
believe既可以做及物动词、也可以做不及物动词。
回忆：
及物动词的基本用法：接宾语（sth./sb./that从句）；接双宾；接宾语及宾补。Believe只有第一种用法，接一个宾语，人也行、事物也行、从句也行。
不及物动词的基本用法：单独使用；与介词搭配相当于一个及物动词，后再接宾语。
套用上面的模型，推导believe的用法：
vt. [1] believe sth.相信某事是真的
[2] believe sb.相信某人说的话是真的
[3] believe + that clause相信从句的内容是真的
vi. [4] believe in + 宾语：信任，信仰
believe强调对事不对人，相信的是具体的某件事；
believe in强调对人不对事，相信的是这个人本身。
真题例句
及物动词
1. In the old days, people believed that teachers had to be very strict and had the right to punish the students. 在过去，人们认为老师必须非常严格，有权利惩罚学生。(2021)
2. I personally believe that if you really want to achieve your dreams and goals in life, you have to add one thing to your success formula: Dream > Believe > Act > Achieve.我个人认为，如果你真的想实现你的梦想和目标，你必须在你的成功公式中增加一件事:梦想>相信>行动>实现。
(2021)
3. Many people today believe that technology is going to help solve some of the most difficult problems we have on Earth today.今天，许多人相信，技术将有助于解决当今地球上一些最棘手的问题。
(2021)
4. Many people believe that yellowing and wetness are the greatest enemy of stamps. 许多人认为发黄和潮湿是邮票最大的敌人。(2016)
5. Older people should believe that it is never too late to dream and that human mind is never too old to make dreams turn into reality. 老年人应该相信，梦想永远不会太迟，人类的头脑永远不会太老，使梦想变成现实。
(2014)
6. We can hardly believe that you learn to dance so quickly. 我们简直不敢相信你学跳舞这么快。(2013)
7. And he believes that whatever happens, it is under control. 他相信无论发生什么，都在控制之中。(2013)
8. Some people say that beginners have all the luck, while others believe that success comes only with practice. 一些人说初学者运气好，而另一些人认为成功只有练习。(2012)
9. So I believe (that) success builds on less luck and chance. 所以我相信成功建立在更少的运气和机会上。(2012)
不及物动词
1. The most important is that you must believe in yourself and never give up! 最重要的是，你必须相信自己，永不放弃! (2016)
I can see the reason that he is so positive is because hebelieves in himself.我明白他如此乐观的原因是因为他相信自己。(2013)