1. We use but to mean except after all, every, any, no and everything, everybody, nothing, nobody, anywhere etc)
- He eats nothing but hamburgers
- Everybody‘s here but George
- I’ve finished all the jobs but one.
We usually use object pronouns (me, him etc) after but.
- Nobody but her would do a think like that.
2. We use the infinitive without to after but.
- That child does nothing but watch TV
(NOT.. nothing but watching TV)
3. Note the expressions next but one, lat but two etc
- My friend lives next door but one (= two houses from me)
- Liverpool are last but one in the football league.