i'mgoingtoexplainthisinenglish
first,it's'ALWAYS'NOT'aways'that'snotaword...
second,understandihopeuknowwhatitmeans,itmeanstoknowthemeaningof.
ican'talwaysunderstand,thatmeans:sometimes,ican'tunderstand.
sothewholesentenceislike:whenppl(people)talktome,sometimesican'tunderstand.
irecommandEnglishtranslationisbetterforu,trytounderstand,it'saeasysentence.