Unit 3 Family matters一、一般现在时构成:动词原形或动词的第三人称单数形式。[观察例句]I often read books in my spare time.业余时间我经常看书。Mary is good at music.玛丽擅长音乐。The earth moves around the sun.地球绕着太阳转。You'll make great progress if you work hard!你如果努力学习,就会取得很大进步。The train leaves at 7:25 this evening.火车今晚 7:25 开。[归纳用法]1 . 一 般 现 在 时 表 示 现 在 经 常 或 反 复 发 生 的 动 作 或 存 在 的 状 态 , 常 和often,always,usually,sometimes,every day,once a week,rarely,seldom,hardly,ever,never 等表示频率的时间状语连用。2.一般现在时用于描述主语的特征、性格、能力等。3.一般现在时用于陈述客观事实或普遍真理。4.在主从复合句中,当描述将来的事情时,主句用将来时,条件状语从句、时间状语从句和让步状语从句用一般现在时代替一般将来时。5.一般现在时表示按规定、计划或时间表将要发生的动作,通常限于表示“位置转移”的非延续性动词(词组),如go,come,leave,start,begin,open,close,arrive,take off 等,其后常跟有表示将来的时间状语。[即时训练 1] 用所给词的适当形式填空1.He always sleeps (sleep) with the windows open.2.The sun rises (rise) in the east.3.The volleyball match will be put off if it rains(rain).4.He likes (like) playing basketball while his brother loves (love) surfing the Internet.5.The concert begins (begin) at 7:30 and ends (end) at 9:30.二、现在进行时构成:is/am/are+现在分词[观察例句]All the classmates are reviewing the lesson in the classroom now.同学们正在教室里复习功课。These days we are helping the farmers work on the farm.这些天我们一直在农场帮农民们干活。She is always thinking of others instead of herself.她总是想着别人而不是她自己。The boy is constantly asking such silly questions.那个男孩老是提这种愚蠢的问题。Mr.Smith is leaving for Nanjing tonight.史密斯先生今晚去南京。The meeting is beginning at three this afternoon.会议在下午三点开...