1.believe的基本意思是“相信”, 相信;认为真实;把(某事)当真;认为有可能;认定;看作；引申可作“信赖”或“信仰”解。
I don't believe you!（接人，表示相信某人的话）
我不相信你的话！
I believe him.
我相信他（的话）。（=I believe his words.）
He did not sound as if he believed her.
他听起来似乎并不相信她。
The man claimed to be a social worker and the old woman believed him.
那个男人自称是社会福利工作者，老妇人信以为真。
I believed his lies for years.
我很多年都对他的谎话信以为真。
I could not believe my eyes. She was far more beautiful than I had imagined.
我简直不敢相信自己的眼睛。她比我想象的漂亮多了。
Believe it or not, he asked me to marry him!
信不信由你，他向我求婚！
That's normal, believe it or not.
那很正常，信不信由你。
The dollar, believe it or not, also rises.
美元也将上涨，信不信由你。
Believe it or not, he or she is on your side and is eager to see you do well.
不管你信不信，他或她都会站在你身边，希望你一切顺利。
But, believe it or not, yellow was once used to mean stop.
但是,信不信由你,黄色曾经被用来表示停止。
Believe it or not, that's exactly what world leaders did at a lunch held by the United Nations in 2015.
信不信由你,世界各国*在2015年联合国举行的午餐会上就是这样做的。
Believe it or not, tomorrow is a new day!
不管你信不信，每一天都是新的！
Believe it or not, she has four children.
信不信由你，她已经有四个小孩了。
seeing is believing.眼见为实。
在口语里, believe还可作“想”“认为”解,表示和缓的、不太肯定的口气,相当于suppose,有时则仅仅表示客气,不愿说得太绝对。
2.believe用作及物动词时,后面可跟名词、代词或that/wh-从句作宾语,也可接以that从句(表示将来)充当直接宾语的双宾语;还可接以“(to be ) n./adj. ”或动词不定式充当补足语的复合宾语(表示过去或现在)。用作不及物动词时,后面常跟介词in。
The party believes (that) education is the most important issue facing the government.
该党把教育视为政府面临的最重要的问题。
I can't believe how much better I feel.
真想不到我觉得好多了。
She couldn't believe (that) it was all happening again.
她简直无法相信整件事又在重演。
She made me believe that she could help me.
她让我相信她能帮助我。
I believed that in civilized countries, torture had ended long ago.
我原以为在文明国家，严刑拷打早已销声匿迹。
这应该是一种虚拟语气用法，快在高考里出现了。
People used to believe (that) the earth was flat.
人们一度认为地球是平的。
He refused to believe (that) his son was involved in drugs.
他不愿相信他的儿子沾染毒品。
I do believe you're right
我的确相信你是对的。
Police believe (that) the man may be armed.
警方认为那个人可能携有武器。
The police believe that the suspect is still in the small town.
警方认为嫌疑人仍藏在这个小镇中。
The vases are believed to be worth over $20 000 each.
那些花瓶据估计每个价值都超过2万元。
What do you think of the boy?The boy who(whom) I believed to be honest fooled me.
你觉得那个男孩怎么样？那个我相信是诚实的男孩愚弄了我。
It is believed that the couple have left the country.
据信那对夫妇已经离开了这个国家。
Three sailors are missing, believed drowned.
有三位船员失踪。相信是淹死了。
注意：
当 believe 和 that 从句连用陈述否定的观点或看法时，通常对 believe 而不是从句中的动词加以否定。例如，通常说
He didn't believe she could do it（他认为她做不到），而很少说
He believed she couldn't do it。
这种在否定前移的句型结构也适用于 consider, suppose 和 think 等意思相近的动词：
I don't consider that you kept your promise.我认为你没有遵守诺言。
I don't suppose he ever saw it.我想他从没见过它。
I don't think he saw me.我认为他没有看到我。
3.当believe为被动语态时，后面习惯接不定式。
You are believed to be honest. 人们相信你是诚实的。
She is believed to be the youngest winner in the country.
她被认为是该国最年轻的冠军。
4.make believe是习惯用语，意为“假装”
make believe (that…)
假装
The children like to make believe that they live in a castle.
孩子们喜欢装作住在城堡中。
