sweep的过去式和过去分词

　　例句：

　　Wintry weather continues to sweep across Colorado.

　　寒冬气候继续席卷科罗拉多州。

　　The rescue helicopter made another sweep over the bay.

　　救援直升机在海湾上空又搜索了一遍。

　　Strong winds regularly sweep the islands.

　　这些岛屿上经常刮大风。