雅思閱讀長難句解析每日一練(8)

　　● 題目：

　　Von Frisch knew from experiments by an earlier researcher that if he put out a bowl of sweet sugar syrup, bees might at first take some time to find it but, once they had done so, within the hour, hundreds of other bees would be eagerly taking the syrup.(劍4, General Training Test B section3)

　　● 分析：

　　本句的主句為“Von Frisch knew from experiments by an earlier researcher that…”; “that if he put out a bowl of sweet sugar syrup, bees might at first take some time to find it but, once they had done so, within the hour, hundreds of other bees would be eagerly taking the syrup”為that引導(dǎo)的賓語從句，做knew的賓語;句子“if he put out a bowl of sweet sugar syrup, bees might at first take some time to find it”和句子“once they had done so, within the hour, hundreds of other bees would be eagerly taking the syrup”并列，由but連接;句子“if he put out a bowl of sweet sugar syrup, bees might at first take some time to find it”中的“if he put out a bowl of sweet sugar syrup”為if引導(dǎo)的條件狀語從句;句子“once they had done so, within the hour, hundreds of other bees would be eagerly taking the syrup”中的“once they had done so”為once引導(dǎo)的時間狀語從句。

　　● 題目：

　　In the first type, a returning scout scampered in circle, alternating to right and left, stopping occasionally to regurgitate food samples to the excited bees chasing after her.(劍4, General Training Test B section3)

　　● 分析：

　　本句主句為“a returning scout scampered in circle”; “alternating to right and left”和“stopping occasionally to regurgitate food samples to the excited bees chasing after her”均為現(xiàn)在分詞短語做伴隨狀語，引導(dǎo)詞省略;“chasing after her”為現(xiàn)在分詞短語做定語，做bees的定語。