10, It isn’t important for you to finish the work today.
⇒ You don’t have to finish the work today
11, There are over eight hundred stamps in Tim’s collection.
⇒ Tim’s collection of stamps is over eight hundred.
12, How old is your father ?
⇒ What is your father age?
13, How high is Big Ben Clock Tower ?
⇒What's the height Big Ben Clock Tower?
14, What is your son’s weight?
⇒ How heavy is your son ?
15,What is the price of this face mask ?
⇒ How much does this face mask cost?