Grammar Learning --- important or not?

My classmates shared their opinion on grammar in last Thursday lesson. It was inspiring.

In the past, we did not care much about our feelings on learning grammar. When teachers assigned lots of exercises to us, we just finished them since we wanted to have good marks in examinations. We do not hate it but we also do not love it because we learned grammar in such a boring way. As I grew older, I started to explore more interesting ways on learning grammar such as listening to western pop songs and reading the lyrics. Now, they are my hobbies.

I think grammar learning is important for primary students in Hong Kong. Firstly, grammar is an essential element of languages. It helps people to convey their messages. If we just 'throw out' some vocabularies, people could not get the messages. It is because those vocabularies do not make sense to them at all. Thus, we need grammar. Secondly, the opportunities for using English in daily lives are not much in Hong Kong. The mother tongue of the majority primary students in Hong Kong is Cantonese. Their parents speak in Cantonese. Their friends and neighbors are speak in Cantonese. Therefore, most of the time, they use Cantonese to communicate with others. How can they 'absorb' grammar of a second language in this environment? As a result, learning grammar become important. Now the question is --- how can teachers guide their students to enjoy learning grammar?