一般现在时和现在进行时一般现在时用法：1. 现阶段经常性习惯性动作或存在的状态I leave home for school at 7 every morning.2. 客观真理, 客观存在，科学事实The earth moves around the sun.Shanghai lies in the east of China.3在格言或警句中Pride goes before a fall.骄者必败。常用时间状语：sometimes, often, every day, usually, always 等构成：1.动词用原形I like it.2.当主语是第三人称单数时，动词要加-s(-es)She likes it.3.be 动词用am，is, are I am a teacher. He is a boy. They are girls.否定形式：1.dont+动词原形I dont like it.They dont like it.
