must用来表示一种肯定的推断，如：She must have some pro...，problem,think,can‘t,单词记忆法、语法用法，与problem,think,can‘t, 相关例句、名人名言

problem单词相关例句：

Every child is an artist. The problem is how to remain an artist once he grows up. 每个孩子都是艺术家,问题在一旦长大后如何仍不失为艺术家.
To feel that one has a place in life solves half the problem of content. ( G. Woodberry )——    如果感觉到自己在生活中有了一个位置，满足的问题就解决了一半。（伍德贝利）

My answer for this math problem is wrong.
我这道数学题的答案是错的。


The youngsters settle the problem by using violence.
年轻人用暴力解决问题。


I'm not good at math, but this problem was pretty easy.
我数学不是很好，但是这个问题相当简单。


You can solve this problem - it's simple!
你可以解决这个问题的，它很简单！


There's a problem with his appendix so it will have to be removed.
他的阑尾出问题了，必须要切除。

Good analytical and problem solving skills.

良好的分析解决问题能力。

Is parking a problem in your country?

停车在你们国家是个问题吗？

But neither can we wait until each and every terrestrial problem has been solved.

但是我们也不能坐等地球上的问题一一解决之后再干。

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。