Vacism is the negative concept of looking down other groups that is not good without reasons.
"He could tell from the smell that he was in the vicinity of a coffee warehouse." "Are there any parks in the vicinity?"
My father had a luminous watch, so in the middle of the night he could tell what time it was.
I could tell how miserable she felt about the hard test when i saw her walk desolately out of her room.
The man makes an earnest living.
context .
I could tell that you were nervous by the perspiration on your brow.
Lots of companies have an individual slogan.
I could tell by the way the teacher was scowling that I didn't have the right answer.
I do not have a word or a sentence but you could start of by making her laugh and be cocky and after you have her attention,you say that"I have something to tell you".
You could tell by the child's face that basketball was his favorite sport.
The meaning is An additional remark at the end of a letter. A sentence could be,I was sending my mom a message but i had to tell her about my new college
Sarah wil now pretend to make the cup disapear.
By the slump of his shoulders, I could tell that John's meeting had not gone well.
I could tell by his facial expression that he was surprised by the event that just occurred.
My mom stopped at the grocery store to buy milk for cereal.
Your question is itself a sentence which uses the word "could".
the students protested agaisnt the surprise quiz given after the lesson was taught.