bump的过去式和过去分词分别是什么

　　bump的中文含义及用法介绍

　　1、作为动词时，意思有(无意地)碰，撞;(尤指身体部位)碰上，撞上;颠簸行进。

　　例句：In the dark I bumped into a chair.

　　我在黑暗中撞上了一把椅子。

　　Be careful not to bump your head on the beam when you stand up.

　　当心站起来时头别撞了横梁。

　　The jeep bumped along the dirt track.

　　吉普车在土路上颠簸着行驶。

　　The airline apologized and bumped us up to first class.

　　航空公司道歉后把我们掉换到头等舱。

　　They stopped walking and he almost bumped into them...

　　他们停下了脚步，结果他差点儿撞到他们身上。

　　2、作为名词时，意思有碰撞(声);撞击(声);肿块(常因击打所致);隆起;凸块。

　　例句：He fell to the ground with a bump .

　　他砰的一声摔倒在地上。

　　She was covered in bumps and bruises.

　　她全身青肿，伤痕累累。

　　We gave her the bumps.

　　我们给她举行了生日举放仪式。

　　I felt a little bump and I knew instantly what had happened...

　　我感觉到一点儿轻微的碰撞，便立刻意识到发生了什么。

　　The truck hit a bump and bounced.

　　卡车开过路面上的隆起处，颠了一下。