Basic changes use in verb those words are included in the う(u)line. Examples include 行く、使う、泳ぐ(およぐ)。。。,the end of each word are all included by the う(u) line such as く(ku)、う(u)、ぐ(gu)
Japan changes contain six kinda of variations. The list is shown in table below.
未然形
change the verb end into the あ(a)line,add the ない on the end. Ex 行く-->行かない
連用形
change the verb end into the い(i)line,add the ます on the end. Ex 行く-->行きます
終止形
change the verb end into the う(u)line. Ex 行く (stay the same)
連体形
change the verb end into the う(u)line,use it connection with noun. Ex 行く-->行く人(walking people)
仮定形
change the verb end into the え(e)line,add the ば on the end. Ex 行く-->行けば
Auxiliary Verbs use on fixing the verb, to help clarify the sentence statue, example ～たい (want to) can put after the verb to transform its meaning. Examples below are:
買いたい (I wish to buy) = 買う(buy) + たい(wish)
Irregular verbs (する and 来る) have different changes.
