Why Local Builders Choose Metal Supermarkets Birmingham For Fast, Custom Cuts

I have flunked the exam, that is why i am attending coaching classes.

Why Local Builders Choose Metal Supermarkets Birmingham For Fast, Custom Cuts 1

I have flunked the exam, which is why i am attending coaching classes.

Is there any change in the meaning of sentence.

Why is it that everybody wants to help me whenever i need someone's help?

Why does everybody want to help me whenever i need someone's help?

Why Local Builders Choose Metal Supermarkets Birmingham For Fast, Custom Cuts 5

Can you please explain to me.

Why Local Builders Choose Metal Supermarkets Birmingham For Fast, Custom Cuts 6

Good explanation of why it's optional in this case, although i'm not convinced that reason is the only reasonable antecedent of why.

For example, the explanation why is a common usage,.

Why Local Builders Choose Metal Supermarkets Birmingham For Fast, Custom Cuts 8

Why should the first person pronoun 'i' always be capitalized?

I realize that at one time a lot of nouns in english were capitalized, but i can't understand the pattern of those.