1、The present and past perfect tenses both belong to the perfect tense.
現(xiàn)在完成時和過去完成時都屬于完成時態(tài)。

2、B. Fill in the blanks with the past perfect or simple past tense of the verbs in brackets.
試用括號里動詞的過去完成時態(tài)或一般過去時態(tài)來填充空格。

3、Learn to express something with Past Perfect Tense.
學習使用過去完成時態(tài)。