There have been countless time that i have forgotten my lunch.
there are countless possibilities to the question that you just asked.
countless means numberless, so it can be used as: "He had countless posters of Jonas Brothers in his room"
the girl was countless the girl was countless
Last summer was intolerably hot so we spent countless hours in the pool.
Example: I cannot remember the countless times I had told you to take a shower.
Countless disagreements over the proper use of national forests have engendered feelings of hostility between ranchers and environmentalists.
Her mom told her countless times to wash the dishes.(Note: Most sentences would contain "countless times".)
Yes. It is a simple sentence because there are no dependent or independent clauses.
Throughout the world's history, there has been countless of murders and deaths.
Refer to the countless enclosed instruction booklets.
Myriad means countless. Myriad students have tried to cheat on their homework using this site.