verb group的用法和樣例：
例句
- The predicate verb must agree with its subject in person and number.
謂語(yǔ)動(dòng)詞應與主語(yǔ)的人稱(chēng)和數一致。 - The order of the two predicate verbs can not be changed, and the negative form is to put the negative adverb before the first verb.
兩個(gè)謂語(yǔ)動(dòng)詞的次序不能改變，否定形式是把否定副詞放在第一個(gè)謂語(yǔ)動(dòng)詞前邊。
