來源:中考網(wǎng) 作者:紫涵 2013-02-05 14:02:56
由時間狀語來判定
一般說來,各種時態(tài)都有特定的時間狀語。與過去完成時連用的時間狀語有:
。 1 ) by + 過去的時間點。
如: I had finished reading the novel by nine o'clock last night.
。 2 ) by the end of + 過去的時間點。
如: We had learned over two thousand English words by the end of last term.
( 3 ) before + 過去的時間點。
如: They had planted six hundred trees before last Wednesday.
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