You are right from the formal point of view but on the other hand positive effect is that 1)most of words are coming from the native speaker 2) small differences in tones may help you to find your mistakes from the comparison .
new comment by Sevastopol
posted March 10, 2020
我想问一下，如果我说。。‘我在中国住了两年‘。 This is simply stating that I lived in China for 2 years with no other info. It's likely from this statement that I'm no longer in China, is that right? If I say 我在中国住了两年了。This is saying that It has been 2 years that I have ...
As we reviewed the dialogue, we noticed that 他的筆很貴 is translated as "My pen is very expensive." But I believe it should be "His pen is very expensive."
Thanks for your great work on this engaging series!