grieve at

We all grieve at [ for, over ] the death of such a loyal son of the Party.

我们对党失去这样一个忠诚的儿子都感到 悲痛.

why is it that we rejoice at a birth and grieve at a funeral? it is because we are not the person involved.

我们为什么听到有人诞生就欢喜，看到有人出殡就悲伤呢？因为诞生的和死亡的都是别人。

I shall not grieve at her death.

对于她的死,我一点也不难过.

why are that we rejoice at a birth and grieve at a funeral? are it because we are not the person concerned?

我们为何在（人家）出生之时高兴而在殡殓之时又悲伤呢？是否因为我们不属于有关人士才这样的？

I shall not grieve at his death.

对于他的死,我一点也不难过.

I feel deeply grieve at your misfortune.

我对你的不幸深感悲伤.