It is so easy to make English grammar mistakes when you are a beginner.
If a teacher never corrects these errors, then you can still be speaking English with lots of little 'wrong bits' even you are a more advanced speaker.
It may be that a sentence directly translated from your own mother-tongue language sounds right in English, but to a native-speaker it is a clear mistake.
This is the aim of this video below: correcting those extremely frequent mistakes that lots of people say.
English grammar mistakes 1 to 5
For the second video, ENGLISH GRAMMAR MISTAKES (6 - 10), please CLICK HERE.
YOU MAY ALSO LIKE TO TEST YOUR GRAMMAR KNOWLEDGE with...
1. Beginner's English grammar quiz
2. The full SGI online grammar test
3. English grammar test for beginners