b. thirteen, ..fifteen, .....eighteen....( 13至19均在个位数后加-teen, 发/ ti:n / )

　　c. twenty, thirty,.... (20至90均在个位后加-ty , 发/ ti / )

　　d. twenty-one,,,,, twenty-nine("几十几"要在个位数和个位数之间加连字符，读and ）

　　(由于基数词的变化有一定的规律,注意引导学生发现数词的构成规律，有利于更容易地掌握基数词。 )

　　Step3: Learning tasks.

1. pre-listening .

　　Show the picture in 1d and talk about it .

　　T: Kate and her mom are shopping in a clothes store . What can you see in this clothes store ? ( black shoes , green sweater , ........)

　　（不仅复习了这些衣物的表达，而且让学生更多地练习了本课时新学的的数词，这样可以帮助学生提高听力效率。）

1. while-listening .

　　① Listen and circle.

　　T: Kate and her mom are going to buy somethings. How much is this? How much are these ? Listen and circle the numbers you hear in 1a.

Then check the answers.