modal auxiliary verbs

常見例句

• 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(yǔ)定式句中題元?jiǎng)釉~不能顯性提升而情態(tài)助動(dòng)詞必須顯性提升的句法知識(shí)。
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