at present technology is developing fast that tall building is being pulled down为什么加ing啊,而不是用ed 不是被动关系吗第二个能不能直接is pulling down啊being在这是啥用法啊.

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at present technology is developing fast that tall building is being pulled down为什么加ing啊,而不是用ed 不是被动关系吗第二个能不能直接is pulling down啊being在这是啥用法啊.
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at present technology is developing fast that tall building is being pulled down为什么加ing啊,而不是用ed 不是被动关系吗第二个能不能直接is pulling down啊being在这是啥用法啊.
at present technology is developing fast that tall building is being pulled down
为什么加ing啊,而不是用ed 不是被动关系吗
第二个能不能直接is pulling down啊being在这是啥用法啊.

at present technology is developing fast that tall building is being pulled down为什么加ing啊,而不是用ed 不是被动关系吗第二个能不能直接is pulling down啊being在这是啥用法啊.
develop 这个单词没有被动形式,没有被发展这个说法,所以不可以用ed
is being pulled down 是现在进行时的被动语态 be + being+过去分词,你可以写成 is pulled down 但不可以写成being pulled down

at present意为现在，所以后面句子语态为进行时。
技术发展为主动形式，不用被动语态，但建筑物摧毁则是人为动作，要用被动语态

是被动用法 建筑物被拆除

at present 用at present造句, at present怎么发音? at the present at present怎么读 at the present 用at present 造句 用at present造句 at present是什么意思 at present的同义词 be present at意思+++++++++++++ at present是什么意思? at present 同义短语 at present 与 for the present 区别 at the present time与at present 的区别 at the present time ,at present ,now的区别` at the present time 和at present一个意思吗 Treasures at present the person