來(lái)源:網(wǎng)絡(luò )資源 2022-03-13 21:29:30
過(guò)去進(jìn)行時(shí)的結構
過(guò)去進(jìn)行時(shí)由“was / were + 現在分詞”構成。如:
I was doing my lessons then. 那時(shí),我在做功課
We were cleaning the house. 我們在打掃房子。
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