all of his friends discourages him from making such a dangerous investment.请问这句话是否有问题,尤其那个介词 from.另：the stronger the motivation,the more likely it will be that a person will succeed.这句话that引导的是否是

all of his friends discourages him from making such a dangerous investment.请问这句话是否有问题,尤其那个介词 from.另：the stronger the motivation,the more likely it will be that a person will succeed.这句话that引导的是否是
all of his friends discourages him from making such a dangerous investment.
请问这句话是否有问题,尤其那个介词 from.
另：the stronger the motivation,the more likely it will be that a person will succeed.
这句话that引导的是否是表语从句,请简单介绍一下表语从句.

all of his friends discourages him from making such a dangerous investment.请问这句话是否有问题,尤其那个介词 from.另：the stronger the motivation,the more likely it will be that a person will succeed.这句话that引导的是否是
1.这句话没有问题.
discourage from
使打消念头,劝阻(某人)不要,劝戒；阻止：
如：She discouraged me from undertaking the work.
她劝我别承担那份工作.
2.此句中that引导的不是是表语从句.这是用it 替代主语从句的句式.
①在主从复合句中,位于系动词之后且充当表语的从句叫做表语从句.
②最常见的表语从句形式就是联系动词be+表语从句.
除be以外,可用于表语从句的联系动词有seem,look,appear,sound,remain等.
③连接表语从句的连接词主要有以下几类：
从属连词：that和whether.两者在表语从句中不做任何成分,that无实意,whether仍保留 是
否的意义.
连接代词：主要有who,whom,whose,what,which,whoever,whosever等.
连接副词：主要有when,where,why,how,whenever,wherever,however等.
其他连接词：because,as if,as though,as,like等连接词也可引导表语从句.
3.表语从句中需注意的问题.
①reason作主语时的表语从句：主语为名词reason时,表语从句的连接词要用that.
如：The reason for such a serious accident is that the driver was too careless and drunk.
②表语从句中的虚拟语气：如果主句的主语是idea,advice,suggestion,order,request等名词时,
表语从句的谓语则应用虚拟语气,即主语无论是单数或复数,谓语一律用 should+动词原形
的形式,should可省略.
如：My suggestion is that we (should) have a discussion about this matter insread just
laying it aside.

第一个问题：discourage sb from doing sth 使某人丧失做某事的信心，使某人泄气
这是一个固定词组，没有问题
第二个问题：不是表语从句，我主语从句，前面用it作形式主语，真正的主语是后面的that从句
动机越强烈，一个人成功的机会就越大

discourage的意思是：(试图)劝阻，劝戒，使打消念头(与from 连用)
这句话的意思是：他所有的朋友都试图劝阻他做那个危险的投资。
the stronger the motivation， the more likely it will be that a person will succeed
这里that引导的是一个主语从句，it是形式主语，that后面是真正...

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discourage的意思是：(试图)劝阻，劝戒，使打消念头(与from 连用)
这句话的意思是：他所有的朋友都试图劝阻他做那个危险的投资。
the stronger the motivation， the more likely it will be that a person will succeed
这里that引导的是一个主语从句，it是形式主语，that后面是真正的主语：that a person will succeed will be
这句话的意思是：动机越强烈，一个人成功的可能性就越大。
表语从句就是用一个句子作为表语。说明主语是什么或者怎么样，由名词、形容词或相当于名词或形容词的词或短语充当，和连系动词一起构成谓语。
比如：His suggestion is that we should stay calm.
但是这个句子并不是表语从句，一般表语从句的be动词都是直接接引导词的。

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这是主语从句that a person will succeed指的是the more likely it will be中的it
所谓表语从句，肯定是系动词（BE,GET,STAY,ETC）后面接的句子

说原因问题补充：答案是B 我是想知道原因 1. 答案：B. 翻译：他所有B On the return of all his friends from abrouad