No, that is not a complete sentence, it is a relative clause (with nothing to relate to). Examples:
What she had done with you was thoughtful.
What reason did she give for what she had done with you?
She said, what she had done with you was at the request of your mother.
yeah that's a proper sentence
Here are some sentences.A proper sentence has a subject and a verb.Use proper etiquette at the party.
it is an un proper sentence
That is not proper
NO. Not at all. It is improper
In the question above, nouns and sentence are the only nouns. Neither of which are proper nouns.
Could you please provide the sentence you would like me to check for proper spelling?
I am done.
The criteria needed to construct a proper sentence would be a subject and predicate, as well as capital letters and proper punctuation. The variables, however, to create a proper sentence vary and this is only an example of what is required.
sentence fragement s misunderstood or in proper symbol or mistake in a sentence
No
No. The expression " due to" must not start a sentence, although it is certainly done by very many careless speakers. Proper use of "due to" is as an adjectival phrase modifying the subject of the phrase or sentence: This shortfall is due to a loss.