my tongue was busy searching out the hole where the tooth had been.最后为什么been后没词了,
问题描述：
my tongue was busy searching out the hole where the tooth had been.最后为什么been后没词了,
为什么要省略.省略的什么
答
因为前面用的是where,所以不需要介词了.
如果前面是用的which或that,后面就需要加介词in或on或at为什么用where就不需要了，这是什么用法因为where本来就是表地点方位的，无需介词。通常问 Where is she? 回答 She is in the hole.没人问 Where is she in?where = in which/thatthe hole where the tooth had been= the hole in which/that the tooth had been= the hole which/that the tooth had been in