有些动词不易用完成时态，它们是understand， think， believ...，understand,believe,think,单词记忆法、语法用法，与understand,believe,think, 相关例句、名人名言

understand单词相关例句：

That is not good language which all understand not. 不是人人都懂的语言不是好语言。
To really understand a man we must judge him in misfortune. 要真正了解一个人，需在不幸中考察他。
To really understand a man we must judge him in misfortune .(Bonaparte Napoleon , French emperor )——要真正了解一个人，需在不幸中考察他。 (法国皇帝 拿破仑. B .)
How do you understand happiness? ----Struggle. 你对幸福的理解是什么?-----斗争.

Eventually I started to understand what the teacher was saying.
最后我才明白老师说的是什么。


He didn't understand her vague words.
他没有理解女孩含糊的话语。


This ribbon is to help people understand the AIDS disease.
红丝带是帮助人们了解艾滋病的。

Do you understand this poem?

你懂这首诗吗？

What do you understand by business ethics?

你是怎样理解职业道德标准的?

Make a phone call to him. He will understand you.

打电话给他吧。他会理解你的。

believe单词相关例句：

Miracels are to those who believe in them. 妖由人兴。
Those who believe money can do everything are frequently prepared to do everything for money. 认为有了钱就能办一切的人，往往准备为了钱而无所不为。
I believe that fame and celebrity, influence and power, success and failure, reality and illusion are all somehow neatly woven into a seamless fabric we laughingly call reality.——Howards Melvin, American essayist我相信声誉和名声、影响和权力、成功和失败、现实和幻想都好像是精心纺织在一匹光洁无缝的织品之中，即我们笑称之为现实的东西。美国散文家  麦尔文.H.
I believe that our Heaven Father invented man because he was dis-appointed in monkey——Mark Twain, American writer  我相信，我们的天父之所以创造人是因为猴子使他失望了。美国作家 马克·吐温  
Don't believe that winning is really everything. It's more important to stand for something. If you don't stand for something, what do you win? ( Lane Kirkland )——    不要认为取胜就是一切，更重要的是要有信念。倘若你没有信念，那胜利又有什么意义呢？（柯克兰）
Who are ready to believe are easy to deceive. 轻信的人容易受骗。
Since a politician never believes what he says ,he is surprised when others believe him.——Charles de Gaulle, French president 政客从来不相信自己说的话，所以，当别人相信他的话时，他必定会大吃一惊。法国总统 戴高乐.C.
You have to believe in yourself.That's the secret of success. 人必须相信自已,这是成功的秘诀.

I can't believe that I was ever that fat!
我不相信我曾经这么胖过。


Do you believe in the existence of dragons?
你相信龙的存在吗？

think单词相关例句：

If you don't learn to think when you are young , you may never learn .(Thomas Edison , American inventor )——如果你年轻时就没有学会思考，那么就永远学不会思考。(美国发明家 爱迪生 . T.)
Ordinary people merely think how they shall spend their time ; a man of talent tries to use it . (Arthur Schopenhauer , German philosopher )——普通人只想到如何度过时间，有才能的人设法利用时间。(德国哲学家 叔本华. A. )
Anger begins with folly, and ends in repentance.——Pythagoras, Ancient Greek mathematician愤怒以愚蠢开始，以后悔告终。古希腊数学家   毕达哥拉斯 Being reluctant to think , unwilling to study intensively and under-stand deeply and being complacent  and satisfied at negligible knowledge  all are the cause of poor intelligence, which can be germed as ""foolish"".Maxim Gorky, Russian writer——懒于思索、不愿意钻研和深入理解、自满和满足于微不足道的知识，都是智力贫乏的原因。这种贫乏通常用两个字来称呼，那就是“愚蠢”。俄国作家   高尔基  M
I've never any pity for conceited people, because I think they carry their comfort about
It is discouraging to think how many people are shocked by honesty and how few by deceit.——( N. Coward )    令人沮丧的是，有那么多人对诚实感到吃惊，而对欺骗感到吃惊的人却那么的少。（科沃德）
Why do you weep? Did you think I was immortal?——Louis XIV, King of France 你为什么哭泣，你认为我永生吗？法国国王 路易十四 "
In every beginning think of the end. 思前顾后。
In prosperity think of adversity. 居安思危。
In music one must think with the heart and  feel with the brains.Victor Hugo, French writer  法国作家  雨果   V

I don't think I could climb that mountain.
我觉得我是攀不上这座山的。