it was reported that 115 miners 【trapped】in the flooded mine for eight days were pulled out alive at last.
你的問(wèn)題這樣理解也許容易些：
1、劃分句子成分：
主體句子結(jié)構(gòu)
【it形式主語(yǔ)】【 was reported被動(dòng)式謂語(yǔ)】【 that 115 miners trapped in the flooded mine for eight days were pulled out alive at last 主語(yǔ)從句】.
從句結(jié)構(gòu)：
【115 miners 主語(yǔ)】【trapped in the flooded mine for eight days 過(guò)去分詞短語(yǔ),后置定語(yǔ)】【 were pulled out謂語(yǔ)】【 alive 狀語(yǔ)】【at last狀語(yǔ)】
2、關(guān)鍵規(guī)律運(yùn)用：一個(gè)簡(jiǎn)單句中,不能同時(shí)存在兩個(gè)非并列的謂語(yǔ)動(dòng)詞.
所給句子中,后面有一個(gè)被動(dòng)式謂語(yǔ)動(dòng)詞短語(yǔ)【were pulled out】,句子中間也沒(méi)有并列連詞,因此,不能再有謂語(yǔ)動(dòng)詞,因此,可以反正：前面需要填的詞只能是【非謂語(yǔ)動(dòng)詞】；
又因?yàn)?115 miners【 礦工】與【困住】這個(gè)動(dòng)作是【礦工被困】,即【被動(dòng)語(yǔ)態(tài)】,因此,只能使用【過(guò)去分詞表被動(dòng)】,而不能用謂語(yǔ)動(dòng)詞【were trapped】.
3、替換理
過(guò)去分詞（短語(yǔ)）作定語(yǔ),相當(dāng)于定語(yǔ)從句：
it was reported that 115 miners 【who were trapped】in the flooded mine for eight days were pulled out alive at last.
4、分析得出的結(jié)論：
看句子中所用的詞,需要注意句子結(jié)構(gòu)和成分.所給從句中,句子的位于已經(jīng)給出在后面,又不是并列句,因此,不能再使用謂語(yǔ)動(dòng)詞,只能使用【非謂語(yǔ)動(dòng)詞】；也可以替換為定語(yǔ)從句,從句中使用謂語(yǔ)動(dòng)詞.
祝你開(kāi)心如意!