In Prepositions^x, Learning English^x, English grammar^x

As for me the biggest obstacles in learning English are mainly the other languages that I speak, I mix them up aaaall the time. Especially French is very unhealthy to my English grammar;-) because a lot of words are written the same way and others are not, such as endings like -ance, ence etc....

It's a shame that your school, like too many others in this country, decided that the study of grammar was dispensable. It gives you a significant handicap when studying foreign languages if you don't know the technicalities of your own language's grammar. (Not everyone would agree with that...