One gloomy thing I Am Not Happy

A Vietnamese girl writed wrote a sentence for "laba" porridge in Chinese. I helped her to correct some mistakes about the pronunciation. The same Chinese character usually has many different pronunciations. When she ask me why it was corrected in this way, I was flabbergasted. like that. Originally I had wanted to explain for her in English. But then i but I discovered that it's it was beyond my English level to express my thoughts.too hard for me. My English level can't express my real minds. So I had no choice but to only explain for to her in Chinese. I am not sure if she understand all understood my meaning. I'm so gloomily. am sad.

I have two questions.
1. Like noun, verb, adjective. What are they is the general name for them? Parts of speech.
2. How translate this sentence in English?

"主要看这个字和什么字组合在一起"  Mainly based on which character with this character compose together. It is important to know what kind of words are grouped together with this word. or

The main thing is to see what kind of words....

You must need to know your punctuation spacing rules.  If you don't know them, see

http://www.italki.com/knowledge/page/Mechanics%20Of%20The%20English%20Language.htm

If you don't understand, ask! :)

Also  我 = I.  No exception.