it is an hour long. it is two centimeters long. 这里的long 在句中都

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it is an hour long. it is two centimeters long. 这里的long 在句中都是什么词性呀?
it is an hour long. it is two centimeters long. 这里的long 在句中都是什么词性呀? 在金山里面前一个是形容词, 是为什么呀?

这两个LONG都是形容词,在IS的后面,做表语.又如,HE IS 17 YEARS OLD,中的OLD也是形容词,在is的后面,做表语.-------------知道了吗?------------
再问：那 17 years 是什么词性呢？？为什么old 要放后面呢？
再答：补充说明old,叫做表语补足语，与old一起构成复合表语。你的句子里的an hour ,two centimeters 也是同一个概念。 ok了吗

it is an hour long. it is two centimeters long. 这里的long 在句中都 How long is it? It is a long My penis is 8 centimeters during the erection.Is it long eno it is a long long good bye So long yes it is so long. How long is it?同义句 it is 8346 meters long.同义句 It takes half an hour as long.句中as long如何理解 It is 1.7 meters long.和 It is 1.7 meter long.哪一句正确? It is 0.9 metres long.和 It is 0.9 metre long.哪句正确? It is 1/4 metres long.和 It is 1/4 metre long.哪句正确?