初心者 1 - 法助動詞と助動詞

to be able to do somehing, make something, etc.

できる, 可能である

used to say what is suitable, right, etc., particularly when one is disapproving of something

べき, しなければならない

(auxiliary) used with the past participle form of a verb when forming the passive voice

ある, いる

(auxiliary verb) used in forming interrogative and negative sentences

する, 持つ

used to show that something is very important and needs to happen

する必要がある, しなければならない