conspire against

1. 密谋反对

He was charged with conspiring against the government.

他被指控密谋推翻政府。

conspire with

1. 与……勾结

He was accused of conspiring with some criminals.

他被指控与一些罪犯勾结在一起。

2. 与……连在一起

The bad weather conspired with some other unpleasant causes to ruin our picnic.

坏天气加上其他一些不愉快原因使我们的野餐令人大为扫兴。