There are many exercises that you can find online for the English language with grammar and vocabulary. It is very important in all aspects of life to be able to speak and write properly. You will be taken much more seriously if you show your skills of the written and spoken language and it can be beneficial in searching for a job. An employer is much more likely to hire someone with excellent
. communication skills. You will sound more educated if you use proper grammar and have an extended vocabulary. You'll be able to join in more conversations if you understand what is being discussed. For more info you can visit http://grammar.ccc.commnet.edu/grammar/.