same as the title
One way is by familiarity and practice in writing complete sentences yourself.......
......and we see little evidence of your efforts in that regard in your post.
Try this one:
" I should _______ my English more."
Put in as many words as you wish.
I didn't mention my patent formula, CLOZOL. Send only $49.99 for a 6-month supply. Satisfaction guaranteed.
Well, the way I do it is by practicing. There are some free samples on the web but the best I have found are at EnlishLanguageDownload.com, they even offer tutoring services so you can have them correct your tests, but I have to say that I didn't use the tutorin and did well anyway