fail用法和搭配
convince的用法有虚拟语气吗？
convince的用法有虚拟语气吗？
be convinced that ... believe that ...
在这个句式中，that从句是陈述语气，不是虚拟语气，时态受前面be的限制。
你提供的这个句子，needed 是实意动词，不是情态动词（后面跟了to do），是一般过去时，跟前面was 的时态一致。
再举数例：
I was convinced that he knew the truth. 我确信他知道事实。
They were convinced that he would not fail them. 他们相信他不会辜负他们的期望。
You will soon be convinced that she is right. 你不久就会相信她是对的。
You will be convinced that our product is superior. 你一定会相信我们的产品比别家的好。
I am not at all convinced that hes so cool a head. 我根本没法相信他的头脑这么冷静。
I am convinced that she is innocent. 我坚信她是清白无辜的。
Im convinced that what you said is quite right. 我相信你说的是对的。
I was convinced that we were doing the right thing. 我坚信我们做的事是对的。
He was convinced that his theories were correct. 他确信他的学说是正确的。
They were convinced that we should give it a try. 他们认为我们应该试一下。
I felt convinced that he would succeed. 我确信他会成功。
I am convinced that is true. 我肯定那是正确的。
fail的名词和形容词？
fail的名词为：failure失败 失败的人(或事物) 未做，未履行(应做之事)；它本身也是名词译为失败，失误； 不及格； 不及格者； [商]期货交割失期
fail的形容词：failed失败的 不成功的
fail没有副词形式。
fail的用法
1、fail用作名词时的意思是“考试不及格”,指在考试中失利,从而没能通过考试。常以单数形式出现。
2、fail常用于without fail句型,表示“一定,必定,肯定”。
3、fail的`基本意思是“失败”,指在从事某项工作时未能达到预定的目的,常常强调做了,但是没有成功 还可指由于某事未能在头脑里形成深刻的印象或其他原因而将某事“忘记”。fail引申可指“不足,短缺,缺乏”“衰退,衰弱”“破产”“辜负”等。
4、fail可用作及物动词,也可用作不及物动词。用作及物动词时接名词、代词或动词不定式作宾语。
5、fail在作“不能,不会,不成功”解时,其后只能搭用不定式短语或介词in。