陈述句变为否定句和一般疑问句的规则：句式方法否定句1. 在 be 动词、情态动词、助动词的后面直接加 not am I am a teacher. I am not a teacher. is She is a student. She isn’t a teacher.1）be are They are from Shanghai. They aren’t from Shanghai.was Tom was bo...

时间:2024-11-22 12:20栏目:幼儿/小学教育