YOU SAID:

Me trying to act casual after I've been day drinking since 10 am

INTO JAPANESE

朝10時から一日中飲んだ後、カジュアルに振る舞おうとしている私

BACK INTO ENGLISH

Me trying to act casual after drinking all day since 10am.

INTO JAPANESE

朝10時から一日中飲んでいたのでカジュアルに振る舞おうとしている私。

BACK INTO ENGLISH

I was trying to act casual because I had been drinking all day since 10am.

INTO JAPANESE

朝10時から一日中飲んでいたので、カジュアルに振る舞おうとしていました。

BACK INTO ENGLISH

I was trying to act casual since I had been drinking all day since 10am.

INTO JAPANESE

朝10時から一日中飲んでいたので、カジュアルに振る舞おうとしていました。

BACK INTO ENGLISH

I was trying to act casual since I had been drinking all day since 10am.