He must have been away 哪个是情态动词 是must还是have

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• 初二英语学习中不懂的问题1.person 和people 什么区别?2.数字变成日期怎么变?（像8 8th 全称是什么?还有那些特殊的 如1 1st）3.是do exercise 还是get lots of exercise (exercise ） 和exercise more 什么区别?4.study 变现在分词是studying吗?5.can may must need 提问时怎么回答?6.反义疑问句：have been 为什么要用haven't sb.
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• 1、期末考试,张华的语文,英语三科的平均分是95分,如果再加上科学,思品与生活,五科平均分是89分.已知科学的得分比思品与生活多6分,那么他的科学和思品与生活各得了多少分?2、选择正确的情态动词填空may should must can't①You have a fever.You ------- see the doctor.②John,------ I borrow your ruler?③You ------ talk loudly in the library.④The clock donesn't work.It ------ be broken.
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