5.It's the third time that youhave forgotten (forget)to bring your English book.

分析 這是你第三次忘記帶英語(yǔ)書了.

解答 答案:have forgotten.
根據(jù)It's the third time that you--(forget)to bring your English book,可知這是你第三次忘記帶英語(yǔ)書了.句子中賓語(yǔ)從句中描述的是已經(jīng)完成的動(dòng)作對(duì)現(xiàn)在造成的影響,故用現(xiàn)在完成時(shí)態(tài).從句主語(yǔ)you是第二人稱,故助動(dòng)詞用have,填have forgotten已經(jīng)忘記.故填have forgotten.

點(diǎn)評(píng) 本題考查用所給單詞的適當(dāng)形式填空,首先要根據(jù)語(yǔ)境明確句意,然后再根據(jù)相關(guān)語(yǔ)法對(duì)所給單詞在形式上做出正確的變化.

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