你好,很高兴为你解答!
上课前,你可以讲：Good morning,class/Boys and girls!
接着是互相致敬：Stand up! Sit down!
开始上课：Ok, class begin!Boys and girls,do you remember where we stopped last class.(等学生回答后,夸奖下他们：Pretty good).So today,we will learn ...,turn to page.../let's go to page...,let's learn new words and expressions first.
快下课可以讲：So much for today,do u have any questions?Goodbye,see u tommorrow!
希望能够帮助到你!