All in English. Here are three phrases you must know to speak like Japanese native speaker.
I went to the Costco yesterday. きのう、コストコに行ったよ
Did you？ え、ほんと？
Yeah. It was my first time and I was so surprised because the store is massive! うん。はじめていったんだけど、お店はとても大きかった！
Oh yeah I know. だよね、大きいよね。
I bought a whole cheese cake and it was just 1000 yen! Can you believe it?! チーズケーキを買ったんだけど、たったの１０００円！信じられる！？
What!? Just 1000yen!? うそ！？たった1000円！？
Yes I definitely go and buy the cheesecake again! うん。ぜったいまた行って、そのチーズケーキを買うよ！
1. はい / うん / そうだよ Yes
ねえ、しょうこさんのたんじょうびパーティーはあした？ Hey, Shoko’s birthday party is it tomorrow?
うん。そうだよ。Yeah, it is.
2. いいえ / ううん / ちがいます / ちがう No
しょうこさんのたんじょうびパーティーはあした？ Is the birthday party for Shoko tomorrow?
ちがう、あさって。No. the day after tomorrow.
Use ちがう when you speak to someone familiar.
3. うそ？ / ほんと？ Really? Seriously? You kidding? No way!
きのう、まちのカフェで、ビヨンセ見た！ I saw Beyonce at the cafe in the town.
うそ！？どこのカフェ！？ No way! Which cafe?
えきのスターバックス、来月で閉まるらしいよ。I heard that the Sturbacks in the station will close down in next month.
ほんと？しらなかった～。Really? I didn’t know that.
