为什么be动词是verb 'to be'
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be动词的原型就叫做be。
be动词有八种形式,如下:
动词原形——be。
第一人称单数现在式——am。
第三人称单数现在式——is。
第二人称单复数、第一、三人称复数现在式——are。
第一、三人称单数过去式——was。
第二人称单复数、第一、三人称复数过去式——were。
过去分词——been。
现在分词(动名词)——being。
助动词be与现在分词连用构成进行时,与过去分词连用构成被动语态,这两种情况下,be动词是不能省略的,例如:
一、和现在分词连用构成进行时:
This is happening in every school throughout the country.
全国各地每所学校都在发生这样的事情。
She didn't always think carefully about what she was doing.
她对自己在做的事情并不总是考虑得很清楚。
Pratt & Whitney has announced that it will be making further job reductions.
普惠公司宣布将进一步裁员。
He had only been trying to help.
他只是想尽力帮忙。
He's doing better than I am.
他现在混得比我好。
二、和过去分词连用构成被动语态。
Forensic experts were called in.
法医专家被请来。
Her husband was killed in a car crash.
她的丈夫死于车祸。
The cost of electricity from coal-fired stations is expected to fall.
用煤作燃料的火力发电站的成本有望降低。
Similar action is being taken by the US government.
美国政府正在采取相似的行动。
希望我能帮助你解疑释惑。
be动词有八种形式,如下:
动词原形——be。
第一人称单数现在式——am。
第三人称单数现在式——is。
第二人称单复数、第一、三人称复数现在式——are。
第一、三人称单数过去式——was。
第二人称单复数、第一、三人称复数过去式——were。
过去分词——been。
现在分词(动名词)——being。
助动词be与现在分词连用构成进行时,与过去分词连用构成被动语态,这两种情况下,be动词是不能省略的,例如:
一、和现在分词连用构成进行时:
This is happening in every school throughout the country.
全国各地每所学校都在发生这样的事情。
She didn't always think carefully about what she was doing.
她对自己在做的事情并不总是考虑得很清楚。
Pratt & Whitney has announced that it will be making further job reductions.
普惠公司宣布将进一步裁员。
He had only been trying to help.
他只是想尽力帮忙。
He's doing better than I am.
他现在混得比我好。
二、和过去分词连用构成被动语态。
Forensic experts were called in.
法医专家被请来。
Her husband was killed in a car crash.
她的丈夫死于车祸。
The cost of electricity from coal-fired stations is expected to fall.
用煤作燃料的火力发电站的成本有望降低。
Similar action is being taken by the US government.
美国政府正在采取相似的行动。
希望我能帮助你解疑释惑。
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