It's obvious that you don't know how to use the word obvious in a sentence because you asked a question on how to use it.
I knew that!
This seems to have an obvious answer. The answer was obvious to all present.
Words are intrinsic components of any sentence.
Isotopes are used.
He had to show research for his project.
i am obvious about this situation
The stain was barely discernable.Discernable actions are obvious.
Most boys are anti-femenist. (what an obvious answer)
One of his more obvious traits was to end virtually every sentence he said with the invented word bilongabong.
I didn't enjoy the holiday much as it was obvious that something was wrong. Their constant bickering made it obvious that something was wrong.
The vulnerability of those caught in the cross fire was obvious.
He was not sure whether he wanted to go, and his ambivalence was obvious as he pondered his decision.
Some people have an awful tendency to misplace things in obvious places.
The anatomical differences between a squid and an octopus are obvious.
Asking someone else to write a simple sentence using the word "laziness" is simply lazy. :) My laziness became obvious to everyone when I asked for help writing a sentence with the word "laziness".
His obvious knowledge instilled confidence in them that they would learn from their new lecturer.
Its really obvious that today was not going to be a good day.