it is difficult what you are doingwhat you are doing is difficult 能否等于 It is difficult what you are doing 急

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it is difficult what you are doingwhat you are doing is difficult 能否等于 It is difficult what you are doing 急
it is difficult what you are doing
what you are doing is difficult 能否等于
It is difficult what you are doing 急

it is difficult what you are doingwhat you are doing is difficult 能否等于 It is difficult what you are doing 急
不可以.
'it '作形式主语,后面一般接动词的过去分词,如‘it is acknowledged that the words are difficult'
或者接可有同位语的名词,此时同位语本身做实际主语,如‘it is a fact that the words are difficut'
你注意到没有,你的‘it is’后面跟的是difficult,是形容词,这种情况下it是不可能作形式主语的,这句话是个病句,没有任何意义

不能,只有第一句是对的,是一个主语从句。

虽然翻译出来的意思一样,但两者不能相等。
第一句话what you are doing 作主语。
第二句话what you are doing 是修饰difficult。 但是语法有问题。

不能,第二个句子是错误的