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It might sound strange to you but these are some important rules. If you want to pass examinations, then study grammar. However, if you want to become fluent in English, try to learn English without studying too much grammar because that will only slow you down and confuse you. You will think about the rules when creating sentences instead of speaking naturally like a native speaker. Some native speakers do not know so many grammar rules as non-native students do.

Everyone can speak at least one language whether they are intelligent, or lack some brain power. This could be achieved by being surrounded by that language at all times. You may notice that there are also some people who study abroad and learn very little. That is because they go to an English speaking school, but find friends from their own country and don’t practice English. Some others can speak English well because they live in an English speaking environment.