In this lesson, you will learn the distinction between transitive verbs and intransitive verbs, expressions for doing something completely/occurrence of natural events, と conditional form, parallel actions by the same person and expression of regrets.

Transitive verbs and intransitive verbs Doing something completely and occurrence of natural events: Vてしまう Conditional form: S1と、S2 Parallel actions by the same person: V1-ながら、V2 Expression of regrets using ～ば conditional form + よかった ("I wish I had...") 的力洋服堂授業試験貸図館終宿題(目)