不定代名詞的用法下列何者錯誤？ Every student is sick. Each student is sick. Every of them is sick. Each of them is sick.?

Every 是形容詞，不是代名詞
( X ) Every of them is sick. 應該改成
( O ) Every one of them is sick.

其他3句 文法基本上正確，意思表達有差別。

every ( 每一個 ) 是著重整體中的所有成員，
each ( 每一個 ) 著重個別性是指各自獨立的每一個 。

Every one of them is sick-------correction
each adj and pronoun:---every one taken separately,independently to each one.
every adi Not pronoun----all possible,each of all everybody everyone, in all places;How about everyday ?