- The rebels armed themselves against the government.
- You speak as if all Sparta conspires against you.
- Some witnesses had testified against him.
- Her past record counts against her.
- It's against the rules of the school to smoke.
- Lying goes against my principles.
- The car clashed against the wall.
- The cyclist was run down by a lorry.
- I ran up against my former teacher in the shop.
- I have by chance run into him on the street.