No one is perfect. It is normal and important to make mistakes in learning language becuase you learn from mistakes. We should point out mistakes politely and encourage them to learn rather than to discourage.

But what should we do when someone claims to be a native speaker and cannot write simple sentences?

I usually ask them to change their proficiency level. Sometimes people have chosen upto 4 native languages and this is a reality at italki.

Moa ... Thank you for your comment.

Sarah... The 'dance floor' is a metaphor. A metaphor is a word that describes something, but it is not a real situation. For example: a long and winding road may be described as a 'ribbon'; the snow covered the earth like a blanket; He is a shining star; Time is money.

So, the quote is saying that a person must be participating in something (on the dance floor) if they want to have a chance (an opportunity) to do the thing they want to do.

"Be a voice, not an echo" is also a great methaphor/quotation.

Thank you.

Nacir... Thank you for your inteligent comments.

It often happens that an Englsih learner will apologize to me for teir less-than-perfect English skills, and I will always remind them that their English is much better than my understanding of their native language, hence I am in total agreement with your comments.

Leyla... Wonderful quotes yes... just like wonderful you. 

I'm glad you saw and read these great quotations/quotes.

Thank you for your nice comments.

Mandarin is a language in north China. But I am a Chinese from south. My classmate from north envies that I can speak southern dialect. She said you master one more language than me.

Now my favorite quotation is,"change is not merely necessary to life, it is life." Because I am experiencing the changes everyday in the recent.

Muhammad... "Love is when the other person's happiness is more important than your own" is a wonderful quotation/quote. I wish I had thought of it :)

That quote/expression is similar to another, "unconditional love": affection with no limits or conditions; complete love.

That you for your comments... always good to hear from you.