> > ここをもうちょっと攻めると(´ωﾟ)becameが妥当だけどさ(´ωﾟ)さらにhave+過去分詞にして過去完了にするとかっこいいかもしれないね
>                                                                     ^^^^had(´ωﾟ)でした
> > I finished the class of today at university, after it I have been drinking a beer, and (then) my face had already became the just a red.

失敬(´ωﾟ)have/has+過去分詞の現在完了の方が(´ωﾟ)時間軸が現在までに至るので現在完了の方がいいね(´ωﾟ)過去完了だと過去の時点で完了する
I finished the class of today at university, after it I have been drinking a beer, and (then) my face have already became the just a red.

ちょっと(´ωﾟ)攻めすぎたかな

参考：2009/11/18(水)18時13分08秒