in midweek

This days I have done my homework, but some topics I don't understood. "Superlative and Comparative" Even I don't understood, the complex thing is that I don't know when we have to use superlative and comparative. I found information about the topic:

 But I keep without understand.

Also I found a chart with some examples about superlative and comparative. I think this chart can help me because there are alot of single words. after there are in comparatives with "more...than", "er" etc.. and the last colum there are examples about superlatives with ending "est".

 +Anita Torres can you tell If you understood this topic? :/ I need help with this..
I hope you answer my question..