Englishfor English speakers
one
Determinative
—
(ordinal first) The number 1.
We have one nose and one mouth.
one
Noun
—
The number 1.
One is the smallest whole number.
one
Pronoun
—
One is a singular pronoun which means "someone" or "people". It is used more often in formal writing.
It is easy to see the difference if one looks closely enough.
touch
Verb
—
If you touch something, you feel it with your hand.
Don't touch the oven -- it's hot and you will get a burn.
—
If you touch something, you move so near to it that there is no space between you and it.