certain的副词怎么写

　　It certainly doesn't rank as his greatest win.

　　这肯定算不上他最大的胜利。

　　The tax increases will certainly hit the poor.

　　增税肯定会加重穷人的负担。

　　I certainly don't begrudge him the Nobel Prize.

　　我肯定不会妒忌他得了获诺贝尔奖。