代詞this，that和it的用法。this和that均指單數(shù)的事物。this指處于說話者近處的事物；that指處于說話者遠處的事物。而it則指代上文出現(xiàn)的單數(shù)的事物，也可指代上文出現(xiàn)的this或that。例如：A：What’s this? 這是什么?B：It’s a pen．這是支鋼筆。c：And what’s that over there? 那邊的是什么?B：It’s a ruler．那是把尺子。教學準備Tape-recorder，multi-medium課時參考四課時Period 1Step l：IntroductionReview greetings.Review the letters learn in the last unit． Get the students to introduce themselves in English．Step 2：Lead—inHave ready a quilt，a map，a jacket，a key，a ruler，a pen，an orange．Hold the key up and say What’s this in English? It’s a key．Repeat and then get students to repeat．Do the same with a key，a pen，a ruler．If possible，use flashcards to teach the spelling of the words．Put a flashcard beneath a drawing of each object.Step 3：PracticeListen．Play the tape twice．Have the students circle the things they hear．Get the students to act out the conversations in the picture of 1 A． Make sure the students understand what they should do．Students can work in pairs then ask them to act out the conversations they made．Do 2a，2b，2c and 2d one after another．2b：after the students do 2a, show them how to write the letters on the blackboards，both of “Big” and “small"．Make sure all the students know how to write them．