上课:toattendclassRelativeexplainations:Examples:1.在上课期间内不要离开学校。Don'tleavetheschoolprecinctsduringschoolhours.2.她准是暗地里一直在上课。Shemusthavebeenhavinglessonsonthesly.3.不论阶级,种族,性别,人人都可进这所学校上课。Everybodycancometothisschool,withoutrespecttoclass,race,orsex.4.因为流行性感冒全校停止上课。Theschoolwasclosedbecauseoftheflu.5.在孩子们住院期间,有个私人教师给他们上课.Thereisatutortoteachthechildrenwhilethey'reinhospital.下课:1.classisover2.That'sit3.dismiss4.togetoutofclass5.todismissclassExamples:1.那些男孩子们渴望下课。Theboyswereitchingforthelessontoend.2.下课后,班长把练习册收了起来。Themonitorcollectedtheexercisebooksaftertheclasswasover.3.下课铃响了.There'sthebellfortheendofthelesson.4.老师要他下课后先别走.Theteachertoldhimtostaybehindafterclass.