Here are three sentences using the word 'could':
"If I could play for a football team, I would."
"I could try to play for a football team."
"If I work hard for my exams I could get good grades."
no, you cant use it asa verb. sorry
The population of Sentice is estimated to be around 10,000 people.
The area of Sentice is 9,270,000.0 square meters.
No
Your question is itself a sentence which uses the word "could".
You could use belongings.
.
You Could write it out using pen or pencil or you could type it up using microsoft word on your computer if you have one.
humor
Single
A sentence using the word Water tight could be "Is this seal watertight?" .
When you are using a compass you are navigating to a certain point. So it could be navigation.