New Post training -아서/어서premisetrigger 【Training㉘】Let’s traning using “-아서/어서” to talk about premise or trigger of action. Basic -아서/어서premisetrigger 【-아서/어서②】A grammar that talks about a premise or trigger for an action. training -아서/어서causereason 【Training⑤】Let’s practice sentences using “아서/어서” to show reasons. Basic -아서/어서causereason 【-아서/어서①】The grammar used when one wants to explain the cause or reason of something to another personally.