Tenses
Simple Present Tense现在式动词
•表示经常做的动作，或有规律的，习惯性的动作
Sarah leaves (leave) home for school at 7am every morning.
The child drinks (drink) milk every day.
•叙述科学事实
The earth moves (move) around the sun.
•给予指示或命令（写回刮弧里的原动词）
First of all,break (break) the eggs and whisk (whisk) with sugar.
Please open (open) the door.
{ He,She,It,人名（一位）} 一般为原本的动词+s,除了以下情况：
a）原动词以“o”结尾时，加“es”
例如：go→goes do→does
b）原动词以“y”结尾时，把y改成“ies”
例如：cry→cries study→studies
然而，若y前面的字是母音字，则直接加“s”
例如：play→plays pay→pays
c）原动词以“fe”,“f”结尾时，把fe,f改成“ves”
例如：knife→knives leaf→leaves
thief→thieves scarf→scarves
d）原动词以“ch”，“sh”，“x”结尾时，加“es”
例如：catch→catches push→pushes
fix→fixes pass→passes
{I，You，We，They，人名（2位以上）} 照写原动词
*“家具”是总称，不能加-s，前面也不能用冠词（a）。“一件家具”应说a piece/an article of furniture;"一套家具”是a set/suite of furniture。*
以下为一些现在式动词的时间词：
every day(week,month,year),every time,always,often,usually,frequently,seldom,
never,once a week,twice a month,on Sundays......
Verb To Be的运用
I →be→改成am
He/She/It →be→改成is
We/You/They→be→改成are
I →not be→改成I’m not
He/She/It →not be→改成isn’t
We/You/They→not be→改成aren’t
Examples：
1.Lisa is (be) a pretty girl.
2.I am not (not be) a genius.
Do和Does的运用
Positive Statement（题目有两个空格）
He/She/It/Singular →does+动词原字
I/You/We/They/Plural→do+动词原字
Negative Statement（Not+动词）
He/She/It/Singular →doesn’t+动词原字
I/You/We/They/Plural→don’t+动词原字
Examples:
1.Do you know (know) the way home?
2.She does not like (like) coffee.
Simple Past Tense过去式动词
•表示过去某个时间发生的动作或状态
Eddle bought (buy) a bicycle three days ago.
He played (play) basketball yesterday.
{所有代名词} 加“ed”或者 改字
例子：
| go |
went |
| do |
did |
| cry |
cried |
| study |
studied |
| die |
died |
| dance |
danced |
| play |
played |
| enjoy |
enjoyed |
| jog |
jogged |
| slay |
slew |
| meet |
met |
| feed |
fed |
| bite |
bit |
| teach |
taught |
| think |
thought |
| fight |
fought |
| seek |
sought |
| cost |
cost |
| cut |
cut |
| hit |
hit |
| hurt |
hurt |
| put |
put |
| shut |
shut |
| let |
let |
| leave |
left |
| wake |
woke |
| wear |
wore |
| break |
broke |
| know |
knew |
| hear |
heard |
past tenses的变化很多，不像plural有一个比较固定的format。past tenses要靠平时多看书。以上只是我简单写一些罢了。
以下为一些过去式动词的时间词：
ago,yesterday,last week,last month,just now,this morning,in 1995,long long ago,
once upon a time,at that time,when,while,......
Verb To Be的运用
I/He/She/It/Singular→be→改成was
You/We/They/Plural→be→改成were
I/He/She/It/Singular→not be→改成wasn’ t
You/We/They/Plural→not be→改成weren’t
Examples:
1.I was (be) at school just now.
2.They were not (be) at home yesterday.
Did的运用
Positive Statement（题目有两个空格）
He/She/It/We/You/They/I→did+动词原字
Negative Statement（Not+动词）
He/She/It/We/You/They/I→didn’t+动词原字
Examples:
1.Did she apologize (apologize) to you yesterday?
2.Laila did not buy (buy) the book just now.
参考：plural的变化
