初中英语语法八大时态一一般现在时1. 结构肯定句式: 主语+动词原形/动词的第三人称单数+其他否定句式: 主语+（助动词） dont/doesnt +动词原形+其他一般疑问句式: Do/Does+主语+动词原形+其他简略回答: (肯)Yes,主语+do/does (否)No,主语+do/does not 缩写形式: dont = do not doesnt = does not 例句：He often goes swimming in summer. I usually leave home for school at 7 every morning.2.用法1）表示经常的、习惯性的动作或存在的状态，常与表示频度的副词连用。常用的频度副词有： always、often、 usually、seldom、never、sometimes, every week (day, year, month), once a week, on Sundays.频度副词在句中通常放在行为动
