Which sentence is correct when comparing two cars for speed?

• My car is faster than yours.
• My car is most fast than yours.
• My car is more faster than yours.
• My car is fastest than yours.

This chair is more comfortable than that sofa. (True/False)

Which sentence uses the correct superlative structure for a book you've read?

• This book is the most interesting I have ever read.
• This book is most interesting than any I read.
• This book is more interesting than all books.
• This book is most interested I read.

Gold is more expensive than silver. (True/False)