dive的过去式和过去分词

　　例句：

　　He dived in after her without a second thought.

　　他不假思索地随她跳入水中。

　　The plane made a dive to a lower altitude.

　　飞机俯冲到较低高度。

　　He dived below the surface of the water.

　　他潜入了水中。

　　Profits really took a dive last year.

　　去年利润确实突然下降了。

　　He dived in and hit his head on the bottom.

　　他跳进水里，头撞到了池底。