English world

today.my third day.i sit on the chair without leaving it abt 5 hrs.
the lecture. makes me tired.
the presentation. makes me fail.
how can i perform as bad as this. using eng as well.
how come i cant present it properly. using eng as well.
how come i cant speak to my friends properly. using eng as well.
how come their talk r so fluent. using eng as well.
how come. u defeat me. U! abominable person.