How much is the watch?[同义句]
What is (the price of) your watch?
can I help you?[同义句]
What can I do for you?
may I look at your new bike?[同义句]
Can I see your new bike
the shirt are $15 each[同义句]
Each shirt costs $15
the shoes are ($10) [对括号里的提问]
How much are shose?
canI help you?[肯定句 否定句]
yes,I can.no,I can't.
就知道这些