of course English is very important . If you cannot speak english frequently ,how you can contract with foreign friends easliy when you are on the ship .So you must or force yourself to study English .
of course English is very important . If you cannot speak english frequently ,how you can contract with foreign friends easliy when you are on the ship .So you must or force yourself to study English .
I can't imagine that there's a wife of a seaman whose English are quite well~! But you should mind your spelling first. I think you can teach me more about that, do you think so?
frequently or fluently?
contract or contact
And the structure "must" seems not quite right you are using here. must is a axualiar verb and don't put it with other verbs on the same level. Although it seems redundant, but I think that "Learning English is only way to achieve it. So you must do it or force yourself to do it" ("it" in the middle of the sentence can be omitted.)
there's no usage of "contact with" first if you use it as a verb, "contact" always goes with "with" when it's a noun.
But I must speak frankly that you're a good English speaker, or a good learner a least.