Great postcard! (I'm writing just keeping smiling :-) )
I sometimes wear the white sweater... but smiling is important! :-)))
Great card. How are the lessons going?
The lessons were great... until they changed the teacher. I think I'm having a good time with my classmates; not sure that I'm learning a lot of English, though.
You probably have enough of a command of English to be able to teach the class yourself :)
I don't know 100% exactly what he is saying (don't understand the word 'command', I'm still white-sweatered keeping smiling :-) ) but I think FinnBadger is totally right!
In this sense 'command' means something along the lines of 'to be able to use or to be in control of'.Just trying to get you to wear the green sweater :)
Thank you for coming. All your comments make me extremely happy.