They disregard social conventions without being conscious that they are doing anything extraordinary.

請(qǐng)問(wèn)這句話中的anything能被Something替代嗎？

something用于一定句，anything用于否定句，所以大家說(shuō)：

They are not doing anything extraordinary.

They are doing something extraordinary.

假如他們正在做不同一般的事情，但自己卻沒(méi)意識(shí)到這一點(diǎn)，大家用主從復(fù)合句，主句為否定句，但從句卻是一定句：

They are not aware that they are doing something extraordinary.

假如他們沒(méi)做不同一般的事情，他們也意識(shí)到這一點(diǎn)，大家用主從復(fù)合句，主句為一定句，從句為否定句：

They are aware that they are not doing anything extraordinary.

類似的例子還有：

He doesnt know he has made some mistakes.

He knows he hasnt made any mistakes.

本句中，主句They disregard social conventions 暗示他們正在某些不符合social conventions的事情，所以that從句應(yīng)該是一定句。我覺(jué)得，本句中的anything不但可以改為something，而且改用something更符合整個(gè)句子的語(yǔ)境。

that從句用一定詞還是非一定詞，不是取決于they是不是意識(shí)到他們做還是沒(méi)做某事，而是取決于說(shuō)話人覺(jué)得他們做了還是未做某事。而句首的they disregard soical conrentions 強(qiáng)烈暗示他們正在做某事，只不過(guò)他們沒(méi)意識(shí)到而已。that從句是個(gè)一定句，應(yīng)該用一定詞something, 而不是非一定詞anything。