To write well we have to read a lot, so we learn vocabulary, phrases, grammar, etc.

I can tell you how
You must read a lot of English if you really want to improve you writing ability
And trust me on that

get a good book that you enjoy and read it a lot!
don't be so hard on yourself , you don't really need to study all the time, enjoy your lecture and your brain will do the rest fo you!

read a lot .. after time you will always remember words in your mind .. this is the best way !

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