同根派生 modal auxiliary verbs相关词英汉例句They also have the knowledge that English modal verbs should be placed on the left of the negator and at the beginning of the interrogatives.這說明受試具有英語定式句中題元動詞不能顯性提陞而情態助動詞必須顯性提陞的句法知識。modal auxiliary verbs更多例句