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1.如果老师对学生们说：“上课”，就是：Class begin，这是个祈使句，所以不加s；2.如果描述课程开始，则要加s，如：class begins on time.  class begin例句 A:When does your class begin? 几点上课？ How does a class begin there? What time does your class begin? It begins at eight-ten. 你的课几点开始？八点十分开始。 class begins例句 In this term, environmental protection English class begins. 这段教材，就是我们环保英语五十句的第一课。 Test the students before the class begins. 课前先测试学生。 The first class begins at 7:50 am. 第一节课于7点50分开始。 (责任编辑：admin) |