请从目的、使用情境、话语特征等方面比较日常话语与课堂教师话语之间的差异。 T 1 : ( speaking loudly ) Today we come to a new unit. Unit 7. Unit 7. Please open your books and turn to page 41. Page 41. What’s it? ( showing her own page to Ss and walking around the classroom quickly to see whether Ss have got the right page ) Please say out loudly. Ss: How much are these...? ( Ss say out loud the title as T writes it on Bb. They stutter over “pants”. ) T 2 : Unit 7 How much are these...? ( writing t he title on the blackboard ) Class, what’s that? ( T points at the “pants”. ) Do you know “pants”? ( Seeing Ss puzzled, T shows a picture of pants to Ss. ) These are pants. ( writing “pants” on the blackboard ) P-a-n-t-s [pænts] ( Signaling Ss to read after her ) . Good. Class, we’ll play a shopping game today 买东西的游戏 . Shopping ( Bb: shopping ) 买东西 I like shopping very much. Do you like shopping?