OMG!美语 Absent-Minded!

大家好！……怎么用美语说心不在焉？forgetful 健忘 Hey, do you wanna go shoe shopping with me tomorrow? 嘿，你想明天跟我去买鞋吗？How could you be so forgetful!? My brother is in town tomorrow and you agreed to go to dinner with us!