地面很湿，因为雨已经下了整整一个下午。
The ground was very wet because it had been raining all afternoon.
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had英 /hæd/|美 /hæd/
been英 /biːn/|美 /bɪn/
raining英 /ˈreɪnɪŋ/|美 /ˈreɪnɪŋ/
解释
had been raining 是过去完成进行时，说明地面潮湿的原因是之前一直在下雨。
The ground was very wet because it had been raining all afternoon.
had been raining 是过去完成进行时，说明地面潮湿的原因是之前一直在下雨。