A preposição "on"

Hello everyone,


Learning how to use it well can give you an advantage.Just have a look at the examples:

a)I´m reading an article "on" how to make money.(Estou lendo um artigo sobre como ganhar dinheiro.)
b)A book "on" women´s main achievements.(Um livro sobre as maiores conquistas das mulheres.)
c)I will see the match "on" tv.(Vou ver a partida na tv.)
d)It happens "on" the net.(Isto acontece na internet.)
e)The headphone was "on" the floor.(O fone de ouvido estava no chão.)
f)The light is "on".(A luz tá ligada.)
g)What´s "on" at the movies?(O que tá passando no cinema?)

Best wishes!