以下内容选自奥风英语《高考语法完全突破记忆大纲》
1. 一般现在时
(1). 一般现在时的句型结构
①肯定句： 主语+ am/is/are+表语
主语+实义动词（+其它）
②否定句： 主语+ am/is/are+not+表语
主语+don’t(doesn’t) +实义动词原形（+其它）
③疑问句： Am/Is/Are+主语+表语
Do(Does)+主语+实义动词原形（+其它）
(2) 一般现在时的用法
① 表示不随时间的变化而变化的事实,真理,格言,警句等.
如：The teacher said the earth goes around the sun.
Practice makes perfect.
Tomorrow is Monday.
② 表示目前,现在经常发生的动作,习惯,或存在的状态.常与下列表示次数的频率副词连用：often, usually, always, sometimes, seldom, every day(week, year, night), once a week等.
如：Class begins at eight every morning.
He looks tired.
We usually get up at :30 in the morning.
Our maths teacher wears a thick pair of glasses.
③ 表示“预定”或是“安排好”要发生的,不会轻易改变的未来动作或安排.常用于此类用法的动词有begin, come, go, move, stop, leave, return, arrive, finish, open, close, start等.
如：The plane leaves for Beijing at 8 o’clock.
The meeting begins at seven.
④ 在表时间和条件的状语从句中,用一般现在时代替将来时.
常见引导时间状语从句的词汇：
when, while, whenever, before, after, till , until, by the time, as soon as等.
常见引导条件状语从句的词汇：
if, unless, as long as , so long as, in case (that), provided (that).
如：We will have an exam when we finish the textbook.
We’ll stay at home if it rains tomorrow.
As long as we keep playing well, we'll keep winning games.
Unless some extra money is found, the theatre will close.
You’d better take an umbrella in case it rains.