I cannot understand your question
a good sentence is "I cannot use oversimplification in a sentence." that sentence is oversimplification.
I cannot read what you have written.
I cannot emphasize my point more strongly.
Yes. There is no word that cannot begin an English sentence. But that does not mean that it is always a good way to begin one.
The sentence: "He concurs this book is good." is not grammatically correct. Alternatives include "He concurs; this book is good." or "He concurs that this book is good." A sentence cannot have two verb-subject pairs without some kind of conjunction.
Since you cannot decide between ice cream or cake, you are very indecisive.
You can't start a sentence with "And". It is incorrect grammar. If you seen or read a book with a sentence starting with and, the editor of the book didn't do a very good job.
NO i cannot answer the freakin sentence
No, because it cannot stand alone as a sentence.
Yes. There is no word or phrase that cannot begin an English sentence. For example: "However you slice it, this was a victory for our side." But when however means "all that other stuff notwithstanding," and is followed by a comma, good stylists do not begin a sentence with it.
I cannot use mitosis in a sentence.
Clinched cannot be used in a sentence.