diamonds do not look very impressive as they are mined钻石刚开采时

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diamonds do not look very impressive as they are mined钻石刚开采时并不光彩照人.
这里为什么是do not 而不是are not

如果用are的话,那look就不用原型了啊,look是系动词啊,不能再有Be动词
再问： do不也是动词吗
再答：亲，这里是助动词啊，一个句子是不能出现两个动词的，否则另一个动词要用非谓语形式
再问：亲，这句话用are怎么改
再答：不可以用be的，be是：是的意思，翻译不通啊，而且你用are的话，就是用ing形式，表示正在经行的，也不对啊，你年纪啊
再问： diamonds are very impressive as they are mined对吗，在百度HI上聊``再问要把分了
再答：这个是可以的，

diamonds do not look very impressive as they are mined钻石刚开采时 diamonds are very impressive as they are mined钻石刚开采时并不光彩照人. [英文]Diamonds, as they are first mined, do not look very impr Diamonds are mined by raising chunks of earth from undergrou they are very tired.why [don't they,not they,do they,not to] we do not see things as they are, we see things as we are 啥子 computers are very popular now and they are not as ___as bef they are not as nice as trains pandas are playing ,they look very lovely With things as they are very good The stars look very small because they are very f They do not swim very well.