mr. li is a good friend of mine. he is a p.e. teacher. he likes football very much. he will watch whenever there is a football match on tv, even at midnight. at school he plays football every day.
on holidays he plays it on the playground near his house. last week he went to korea to watch the world cup football match. he wont come back until the match is over.
牛津实用英语语法:187与for和since连用
牛津实用英语语法:156 must表示推断
牛津实用英语语法:145 肯定句中 must和 have to的区别
牛津实用英语语法:154 needn't，could和should+完成式
牛津实用英语语法:111 附加评论
牛津实用英语语法:141 ought／should与must和 have to的比较
牛津实用英语语法:181过去进行时替代一般过去时的用法
牛津实用英语语法:226 if，even if，whether，unless，but for，
牛津实用英语语法:157 must与may／might的比较
牛津实用英语语法:159 can't和couldn't表示否定的推断