Yes, you have to use correct grammatical rules when forming sentences. It is however your own choice whether to learn grammar systematically by studying the rules and doing grammar exercises or just by learning sentences through reading,listening and speaking and thereby picking up the sentence strucutre and grammatical rules by repetition and instant observation. Frequent grammar errors will render your sentences incomprehensible, so it is inevitable to know how to apply the grammatical rules correctly and avoid mistakes,even if it is just about small talk or informal conversations. If you are using the language professionally ,doing any mistakes will be regarded as a shortage and might cause you in certain cases to loose a job for example or be judged as unqualified for a certain post. Grammar is therefore essential when learning a language, yet the approach of acquiring those rules and being able to apply them efficiently is left for you to choose.

If you don't want to learn the language, you don't have to learn grammar :).

Grammar is very important in many languages. I understand that you have difficulties with grammar, since Chinese isn't very grammatical. But don't worry; you'll learn English grammar eventually. You just need to keep studying and practicing, and you'll speak English well.

Yes and these sites will help you learn English. You can learn English using Chinese at Italki at http://www.italki.com/knowledge/learn-English-Chinese.htm Here are the Italki English teachers who speak Chinese Mandarin http://www.italki.com/teachers/1-3-English-Chinese--0-999999-0-0-1.htm Here are the Italki English/ Chinese speakers. Email some of them and invite them to be your friend or language partner. Set up a time to chat on MSN or SKYPE. Remember the time differences between countries, If there is a green light next to a person's name, it means that they are on line. Good luck! Click on here: http://www.italki.com/partners/1-Chinese-English200-00-0.htm There is a free online talking dictionary of English pronunciation. Just click over the pink words to hear them spoken at www.howjsay.com/index.php?word. Here is a free online translation service: http://free-translator.imtranslator.net There are many Italki groups for learning English. Here are 2 groups for Chinese speakers learning English: http://www.italki.com/groups/165 Also http://www.italki.com/groups/710 To improve your English Group: Click onto: http://www.italki.com/groups/English/254. English Writing Group: http://www.italki.com/groups/3116 Italki English Skype Chat group http://www.italki.com/groups/740/topic/9312.htm

Yes, you do!