Even when the subject of the sentence changes, the auxiliary verb stays the same
Auxiliary verbs, such as can or may stay the same, even when the subject of the sentence changes
「主語が変わっても助動詞は形が変わらない。」= Even when the subject of the sentence changes, the auxiliary verb stays the same / Auxiliary verbs, such as can or may stay the same, even when the subject of the sentence changes
ボキャブラリー
subject = 主語
sentence = 文書
change = 変わる
auxiliary verb = 助動詞
such as = のような
stay the same = 変わらない