來(lái)源:網(wǎng)絡(luò)資源 2023-01-12 10:27:51
由時(shí)間狀語(yǔ)來(lái)判定
一般說(shuō)來(lái),各種時(shí)態(tài)都有特定的時(shí)間狀語(yǔ)。與過(guò)去完成時(shí)連用的時(shí)間狀語(yǔ)有:
(1)by + 過(guò)去的時(shí)間點(diǎn),例如:
I had finished reading the novel by nine o'clock last night.
到昨天晚上九點(diǎn)鐘為止,我已經(jīng)讀完了這本小說(shuō)。
(2)by the end of + 過(guò)去的時(shí)間點(diǎn),例如:
We had learned over two thousand English words by the end of last term.
到上學(xué)期末為止,我們已經(jīng)學(xué)了兩千多單詞。
(3)before + 過(guò)去的時(shí)間點(diǎn),例如:
They had planted six hundred trees before last Wednesday.
在上周三之前,他們已經(jīng)植了六百棵樹(shù)。
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