conspire against

1. 密謀反對
   He was charged with conspiring against the government.

   他被指控密謀推翻政府。

conspire with

1. 與……勾結
   He was accused of conspiring with some criminals.

   他被指控與一些罪犯勾結在一起。

2. 與……連在一起
   The bad weather conspired with some other unpleasant causes to ruin our picnic.

   壞天氣加上其他一些不愉快原因使我們的野餐令人大為掃興。