Student or Learner
Ali is the only child of his father.(Is it right to say ''only'' for ''one child '' here)
There are only some fruits in the basket.
You are my one and only friend whom I love much.
Noor has only three siblings.
Only a cup of tea is left behind when they left the table.
- Can I use ''only'' for one and ''more than one'' ?
Not a teacher.
I always think of "only" as a result of "onely" to express uniqueness. As such it is used to exclude any other options than what follows it. AS such, its functions are very simmilar to those of "but":
Ali is the only child of his father.(Ali father's descendence is exclusively one child./ Ali's father has but one son.)
There are only some fruits in the basket. (The contents of the basket are exclusively some fruits. There are but some fruits in the basket)
Following the above line of thougth "one and only" is, obviously, emphasizing uniqueness:
You are my one and only friend whom I love much. (I have no other friends at all but you)
For the thread starter:
Only one/two/three/a million...
I would indeed be gratefull for a comment on this.