The boy feels much better after he took the medicine

The boy feels much better after he took the medicine
前后时态不正确

The boy felt much better after he took the medicine

The boy feels much better after he takes the medicine

I hope to go staying peaceful to spend my vacation
说成太平地生活的话说成 in peace!做状语或表语

I hope to spend my vacation in peace.

不对，后面明显是一个过去时态，前面就不能用feels,应该改成felt.
下面的那句话也很别扭，换成 i want to spend my vacation in a peaceful way.可能会更好些。

i hope to spending my vacation in a peaceful place

The boy feels much better after he took the medicine
时态要一致哦 feels 对应 takes
felt 对应 took 哟

I hope to go staying peaceful to spend my vacation 感觉有点拗口哎

要是我 会这样讲 I wish to spend my vacation in peace~ 呵呵