为什么说动词be是 to be?最近看了一段话：The Forms of “To Be”The Greek sea god,Proteus,was (like the sea) capable of changing form in an instant.In order to get any decent information out of him,you had to grab him and hold on tight

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为什么说动词be是 to be?最近看了一段话：The Forms of “To Be”The Greek sea god,Proteus,was (like the sea) capable of changing form in an instant.In order to get any decent information out of him,you had to grab him and hold on tight
为什么说动词be是 to be?
最近看了一段话：
The Forms of “To Be”
The Greek sea god,Proteus,was (like the sea) capable of changing form in an instant.In order to get any decent information out of him,you had to grab him and hold on tight while he went through his various forms — lion,wild boar,snake,tree,running stream — it wasn't easy.The verb “To be” is said to be the most protean of the English language,constantly changing form,sometimes without much of a discernible pattern.Considering that we use it so often,it is really too bad that the verb “To be” has to be the most irregular,slippery verb in the language.
为什么每次提到“be”不直接说“be”?而一提be就是“to be”,看了好多都这样.
见网页：|
"to work" "to write"为什么这样表示？

动词如果要单独表示出来的话前面都要加to，表明它是个动词

这是动词不定式的表示方法。be动词在没有时态变化时，也就是不变am，is，are，就是原形，它的用法和一般的动词也是相似的，所以都要加to。
还有就是本身就是要加to的地方，像是have to do/be。

为什么说动词be是 to be?最近看了一段话：The Forms of “To Be”The Greek sea god,Proteus,was (like the sea) capable of changing form in an instant.In order to get any decent information out of him,you had to grab him and hold on tight to是介词为什么be going to是情态动词 Be动词的用法,为什么I went to park是过去式不用be动词,什么时候用 to believe 还是 to be believe 为什么还有个be to do believe 是动词为什么还加be to be+形容词看书的时候看到一句话是refuse to be unhappy,be cheerful instead,查了下资料上说to be+ved表示动词不定式的被动语态,那为什么这里要用unhappy,unhappy是形容词,这个怎么理解啊,还有be cheerful in 请问belong to sb前能不能加助动词?为什么?或者情态动词呢?对不起,打错了,是be动词 What_____ Mary and Kate talking about? A.does B.is C.are D.do为什么不能选B 这里为什么不用be动词的就近原则?名词在 be动词之后不是看离 be最近的那个名词是单数还是复数然后再选用be动词吗? 麻烦高手英语语法之be动词?在这句 I wanted to know the truth 中它的意思是“我以前想知道真相”还是“我想知道真相”?如果是一般过去时那为什么没有be动词?我该去看语法书里的那些内容呢?如果加了be to be后接动词的问题Your hair needs to be cut.The garden wants to be watered.这两个句子为什么要加be,to后面直接加动词不就可以了吗?或者说,need和wants后直接加动词不行吗? to be living 是名词还是动词 used to be是系动词吗! they will be arriving here tomorrow arrive已经是动词了为什么will 后要加be呢 be surprise to do sth是什么意思老师说to do sth是动词不定式 be able to中be是be动词还是实意动词祈使句 Be quick!be动词祈使句 Be quick,既然是省略主语,那也就是有主语,be动词为什么不用are,不是说be动词必须根据主语变化而变化吗? be used to和used to的to是介词还是动词不定式?为什么? there will also be more space for people to walk in the streets.also 不是三后一前be动词后吗?为什么这里用到be动词前了. There_____no hurry,need there?为什么是need be 而不是need to be为什么说need在这里是情态动词,为什么不是实义动词,如果选need to do 错在哪里了?谁能帮我解决一下这个疑惑呢?不要抄袭别人的哦,我看到