Basic Guidelines For English Spellings
READ THESE ARTICLES
See US English definition of but
See UK English definition of but
See Spanish definition of pero
1‘he stumbled but didn't fall’
and
2‘I am clean but you are dirty’
and
3‘one cannot but sympathize’
1‘everyone but him had gone’
including
1‘he is but a shadow of his former self’
‘but for the rain he would have gone’