Introduction

I'm a Chinese person,who is preparing for the entrance exam for postgraduates. I had been learning English off and on before I decided to take the exam. I like english but it was hard to consist(?) without using it. Now, is a good chance to excercise it. l remember some words, but I am confused. When I read them in essays, I know what they mean, but I don't know how to use them properly. Especially -tion -uous...or the prep. of the verbs. that's why i want to write essays here.
If you are from an English speaking country, thanks for rectifing my essay, but please ignore the initials,because i am writing with my phone.