Although you will still see the double quotation marks used to quote direct speech it is more and more common to punctuate speech and direct quotations with single quotation marks with the double quotation marks reserved for quoting ’speech within speech’.
The Apostrophe
The apostrophe probably causes more grief than any of the other punctuation marks put together!
Use the question mark:
The semicolon is somewhere between a weak full stop and a strong comma and used to join phrases and sentences without having to use a conjunction (and, but etc.) where the phrases or sentences are thematically linked but independent.
There are some general rules which you can apply when using the comma.
However, you will find that in English there are many other ways to use the comma to add to the meaning of a sentence or to emphasise an item, point or meaning.