Some English mistakes I’ve seen...

1) Use of ‘a’ and Articles

For example “ I’m a Chinese”, “I’m a Korean”, “I’m a Japanese”.
A shouldn’t be used here unless you add “ person” it will become “ I am a~person”. ~ can be any adjectives. For example “ I’m a funny person”. Please not that
‘a’ goes with consonants and ‘an’ goes with vowels.

2) Boring and bored
To say you are bored, it is “I’m bored” and is not “I’m boring”. “I’m boring” means you are not a fun person.

3) The use of “The”, this is another article. The is used for specific things, for example “I want the book”. This means I want a particular book and not any book.

Remember: Sometimes you don’t need the word “the”, and sometimes you do.
For example: I play piano
I play the piano