The little boy is very mature for someone his age.
She knew she had finally matured when she started making decisions based on careful consideration rather than impulsivity.
The sapling will undergo many changes before it becomes a mature tree.
I am anxious to try these apples when they mature.
I am sorry if you thought my connotation of that word meant you were a bad person.Referring to me as a very mature woman has a negative connotation.
you could write this:Justin showed such precocity today.The word precocity is a noun meaning exhibiting mature qualities
No. Only if you begin a sentence with it. It is not a proper nor common noun, but an adjective.
It's important to transcend your base instincts.
To prop a mature tree that is leaning, you should consider the ground under the tree. You can use another support or use a string to prop a mature tree that is leaning.
China has a copious amount of people.
i do not know how to use embalming in a sentence. (there is the sentence)
He always acts responsibly and fulfills his obligations diligently.
So- you are asking when to use 'when' in a sentence. When you are asking how to use when in a question, you are already using when in a sentence, because a question actually is a sentence. I like to use when in a sentence whenever I like.