Any mistake with the grammar and collocations? The obvious argument in favour of studying a foreign language from an early age is that young children pick up languages much more easily than teenagers. For example, young children acquire a language by imitating the adults and babbling what they hear unconsciously from day to day so they can easily master this language as they grow older. But this method of language learning cannot be applied to teenagers. Teenagers have developed a relatively fixed mind-set influenced by their mother tongue, so it’s not that easy to change their thinking pattern to adapt to a new language，so if they want to learn a foreign language, they usually start with the basics like pronunciation，vocabulary and grammar.