A sentence could be:
"i was remain to believe" does not make sense and is bad grammar.
I remain undaunted at the task.
I remain a scar after the wound that I got
i believe you already did
No. I believe you want "Does that have . . ." or "That has . . . "
Truthfully,I believe you.
I believe you know what believe means and how to use believe in a sentence.
Some people believe in aliens. Alien is a noun so use it in a sentence as a person
I entered the room stealthily, hoping to remain unnoticed.
I don't want to take sides so I will remain neutral.
You are a Muslim if you believe in Islam.
"You have got to believe me," Gloria beseeched him.
We don't believe that is a real word