八种时态
一、一般
现在时：
概念：表示现阶段经常或习惯发生的动作或存在的状态,或说明主语的特征。
用法：A) 表示现在发生的动作、情况、状态和特征。
B) 经常性、习惯性动作。常与频率副词连用。
Eg.：He always helps others. （他总是帮助别人。）
C) 客观事实和普遍真理。
Eg. The earth turns round the sun.(地球绕着太阳转)
Light travels faster than sound.(光传播比声音快)
D) 表示一个按规定、计划或安排要发生的动作，（仅限于某些表示“来、去、动、停、开始、结束、继续”等的动词）可以与表示未来时间的状语搭配使用。常见的用法是：飞机、火车、轮船、汽车等定期定点运行的交通方式。
Eg.The next train leaves at 3 o'clock this afternoon.
Eg.How often does this shuttle bus run? （这班车多久一趟？）
E) 在时间状语从句中(以when, after, before, while, until, as soon as等引导)和条件状语从句中(以if,unless 引导),用一般现在时代替一般将来时,句子可以有将来时间。
Eg.：Please ring me up as soon as you arrive in Germany.(你一到德国就给我打电话)
If it rains tomorrow,we will have to stay at home.(如果明天下雨我们就只好呆在家)
时间状语：always, usually, often, sometimes, every week (day, year, month…), once a week, on Sundays, etc.
基本结构：①be动词；②行为动词
否定形式：①am/is/are+not;②此时态的谓语动词若为行为动词，则在其前加don't,如主语为第三人称单数，则用doesn't，同时还原行为动词。
一般疑问句：①把be动词放于句首；②用助动词do提问，如主语为第三人称单数，则用does，同时，还原行为动词。
1 We often _____ (play) in the playground.
2 _____Mike_____ (read) English everyday?
3 Mike sometimes______ (go) to the park with her sister.
4 She usually _____ (watch) TV at 7 o’clock.
把下列句子变为否定句和一般疑问句。
It is a fine day today.
否定句：
一般疑问句：
肯定回答：
否定回答：
Jill’s father works in a factory.
否定句：
一般疑问句：
肯定回答：
否定回答
LHB and LHS share the same room.
否定句：
一般疑问句：
肯定回答：
否定回答
Her daughter is very young.
否定句：
一般疑问句：
肯定回答：
否定回答
Geography and physics are my favorite subjects.
改错：
Kitty have a good friend. Her name is Alice. They are both eleven years old. They live in the same housing estate, but in different blocks. Kitty live in Block 1 and Alice lives in Block 2.
Kitty and Alice usually goes to school together. Sometimes they likes to eat their lunch together and share their food. They always play together after school. They is happy to be together.
二、一般过去时：不规则动词表
概念：过去某个时间里发生的动作或状态；过去习惯性、经常性的动作、行为。这种动作或状态可能是一次性,也可能经常发生。
时间状语：ago, yesterday, the day before yesterday, last week(year, night, month…), in 1989, just now, at the age of 5, one day, long long ago, once upon a time, the other day etc.
基本结构：①be动词；②行为动词
否定形式：①was/were+not;②在行为动词前加didn't，同时还原行为动词。
一般疑问句：①was或were放于句首；②用助动词do的过去式did 提问，同时还原行为动词。a. 过去某个时间里发生的动作或状态
Eg.He left for Beijing yesterday morning.
他昨天上午到北京去了。
She wasn't at home last night.
她昨晚上在家。
Did you finish your work at four yesterday afternoon?
你昨天下午四点完成工作了吗？
b．表示过去经常或反复发生的动作。
I got up very early at that time.
我那时总是起得很早。
Mary always got up too late and never had enough time for breakfast when she was at middle school.
玛丽上中学时总是起得很晚，从来都没有足够时间吃早饭。
