语法检测-不定式保留了大部分动词特征，因此它的时态和语态有很大的变化，通常如下
编辑：pitaya02 日期：2020-12-12
第一种不定式被动态
不定式的被动态和主动态的用法完全相同，只是动词从主动意义变成了被动意义。
不定式的完成态，无源完成态，进行态，持续态
无定式的完成态，被动完成态，进行态，持续态通常只出现在句子中，如主系表结构，被动语态等等。其原因在于，这类句子含有系动词或助动词 be，如果使用了动名词或分词，就容易被理解为动词结构。
不定式的完成态强调过去发生或已经发生的行为。
For in all adversity of fortune,
the worst sort of misery is to have been happy.
一切不幸中，最不幸的是曾经很快乐。
He pretended to have fallen
asleep when little Tom came to him.
小汤姆来找他的时候，他装作已经睡着了。
The student seems to have caught
a cold because of the bad weather.
因为天气不好，这个学生似乎感冒了。
I am sorry to have kept you
维特林。
很抱歉让你久等。
I'm glad to have met your
parents here.
真高兴在这里见到你的父母。
The manager is said to have
arrived back from Paris.
听说经理从巴黎回来了。
注：
不定式的完成态也可以表示虚拟，表示本来应该发生但没有发生的过去的行为。
He'd like to have been offered the job
and (to have been) given the opportunity to prove himself.
他希望这份工作能得到回报，能有机会证明自己。
The game was to have
taken place in USA.
这场比赛本来计划在美国。
Mr. white planned to
have gone abroad last week.
=Mr. white planned to
go abroad but he didn't.
White先生打算上星期出国。
用动词不定式的过去完成式和动词不定式的一般形式可以表达相同的意思。比如：
I had hoped to visit
the great pyramid.
=I hoped to have
visited the great pyramid.
=I hoped to visit it,
but I didn't.
我想去看看大金字塔。
不定式的完成态表示已发生或已发生的被动动作。
The book is said to have been translated into several
兰格格.
据称，该书已被译成多种语言。
No harm seems to have been done.
看起来没有造成破坏。
You're lucky to have been
动作步骤。
您是幸运的，您被接纳了。
不定式的进行态表示与谓语动词同时出现的动作。
He seems to be thinking about
the question right now.
看来她在考虑这个问题。
He pretended to be doing his homework when he heard his
Father’ sound。
听着爸爸的声音，他假装在做功课。
The president was reported to be
visiting the hospital.
据说总统正去参观那个医院。
We didn't expect you to be
waiting for us here.
咱们可不指望你在这儿等。
4.不定式的持续状态表示持续不断的动作。
All the scientists in
this field are known to have been working on the
problem for many
Years。
我们都知道在所有领域的科学家都在研究这个问题。
此文就到此结束，书中对非谓动词部分的讲解。在这一部分中，我们还可以看到，非谓语动词是整个语法系统中最难、最复杂的一块，它需要抽丝剥茧地认真学习。
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