I once studied English when I was a student,but my English is still poor.
In past,I wasn't interesed in English and rarely used it,after graduated,I forgot most of the basics.
My basics are not enough and I always don't know which words or grammar to use,words are with the same meaning in Chinese,but they are different in English,it's the one of my challenges.
I don't know a lot of grammar and words and usually look up the English dictionaries.
English and Chinese are many differences, relatives are called in many ways,for exsample, father's sisters are called "姑姑",mother's sisters are called"阿姨"in Chinese ,but parents' sisters are all called "anut" in English.
The sentence "What are you doing now?"became"you now doing what?", in the chinese,when something is a large amount,we use "很多" to describe a lot of something in the Chinese,we use"many","a lot of"and"much" to mean the same thing in the English.
Grammar difference between Chinese and English is the most difficult of my chllenges of English learning.