It is very difficult to know our own level, but you can check yourself, because there are many test in internet sites that could mesuare the english we manage. You have to make the different test and you
will get a close aproach of the grade you can obtain, althout it is very hard to get a real result. The evaluation is one of the worst method to "Evaluate"... I think one language is never done, even the mother tongue, we can never dominate all the grammar and vocabulary of our own language, so what can we hope about a second tongue.
Greetings.
we're always learning so:
wrong - correct
mesuare - measure
althout - although
second tongue - second lengauge
bye