

Here is a dictionary for you to look up what a word means. Generally, the OED is seen as the most universally respected dictionary and is produced by Oxford University.
Word Reference Online provides translation between English and eighteen other languages, including Chinese, French, German, Korean, Japanese, and Spanish.
Here is a dictionary online for you to use. The Merriam-Webster dictionary online is easy-to-use and helpful for defining all sorts of words.
Purdue University’s OWL provides materials and links specifically designed for international students, including tutorials on such subjects as parts of speech, punctuation, and others.
Follow this link for the general writing resources for writing papers.
Resource on the difference between the uses of “a” and “an” versus “the,” otherwise known as definite and indefinite article adjectives.