you (americans) have rules on word formation?

Question

i learn english , and i dont understand HOW to learn the word formation!!!!

Answer 1

By word formation do you refer to conjugation of verbs?

Unfortunately, many verbs are irregular in English, and these forms are not as easily learned as in, say, Spanish.

Practice, and attentiveness during classes and in reading, are the key to constant improvements. 

There are many ways to improve, including making and using flash cards.