仁爱英语七年级下册语法讲解：一般现在时、现在进行时及一般过去时

否定句
I am not a worker.
He(She, It) is not a worker. We are not workers.
疑问句
Are you a worker?
Is he(she, it) a worker? Are we workers?
You are worker. You are not worker. Are you worker?
现在进行时的构成形式有: 肯定句,疑问句, 否定句,疑问否定式
肯定句
I am working.
疑问句
Am I working?
否定句
I am not working.
He(She, It) is working.
We are working.
Is he(she, it) working?
Are we working?
动词的类别
（根据其在句中的功能）
③情态动词（表示能力，义务，必要，猜测等说话人 的语气或情态。情态动词只能和动词原形一起构成谓 语动词。） can、may、could、need、must、shoud
④系动词（后跟形容词构成系表结构）
look、taste、smell、feel、get、become
⑤实义动词（行为）动词（有完整的词义，并能单独 作谓语）
现在分词 的构成：
①直接加-ing.
sleep---sleeping study---studying speak---speaking say---saying
②重读“辅元辅”结构，双写尾字母加-ing.
stop---stopping sit---sitting run---running forget---forgetting
They are workers. They are not workers. Are they workers?
肯定句
I work. He(She, It) works. We work. You work.
否定句
疑问句
I do not work.
Do I work?
He(She, It) does not Does he(she, it)
现在进行时
现在进行时态表示正在进行的动作,可和now, look, listen, at present, at this moment, these days等时间 词连用.
e.g. What are you doing now, John? Where are you doing? The telephone is ringing, would you answer it? I’m not doing anything at present. He is writing a novel these days.
时态大比拼
一般现在时、现在进行时、一般过去时
时态
Tense
在英语中，不同时间发生的动作 或存在的状态要用不同的动词形式来 表现。
重点掌握
每种时态的概念、信息词、
结构、句式变化、以及某些时态 间的相互区别
①Be动词 am、is、are/was、were
②助动词（只能和主要动词一起构成各种时态，语态 和语气等动词形式。） do、does/did/done
②以s, x, ch, sh, o结尾加-es.
guess—guesses teach—teaches brush—brushes， go—goes， do—does， watch—watches
③以“辅音+y “结尾变y 为i再加-es.
study—studies， carry—carries， fly—flies， worry—worries
③以e 结尾去e加-ing .
make---making come---coming take---taking have---having
④以ie结尾的动词，把ie改为y ，再加ing
die---dying lie---lying
一般过去时
1.定义: 1) 表示过去某个时间发生的动作或存在 的状态,常和表示过去的时间状语(如yesterday, last night, in 1990, two days ago...)连用; 2) 也表示过去经常或反复发生的动作, 常和表示 频度的时间状语(如often, always…)连用。
work.
work?
We do not work. Do we work? You do not work. Do you work?
They work. They do not work. Do they work?
动词第三人 称
单数的构成：
①直接加-s.
play—plays， want—wants， know—knows， help—helps
及物动词后面必须跟宾语 buy, catch, invent, found, like,
及物动词后面必须跟宾语 agree, go, work, listen, look, come, die,
现在进行时：
(The Present
现在正在进行的动作
Continuous Tense)
时 态
一般现在时：经常或习惯ቤተ መጻሕፍቲ ባይዱ的动
(The Simple 作或存在的状态。
Present Tense)
一(般Th过e Si去mp时le ：过去某个时间或时间段发 Past Tense) 生的动作或存在的状态。
一般现在时
一般现在时表常常发生的动作或经常存在的状态, 常 和always, often, usually, every day, sometimes等表示 时间的状语连用.
He(She, It) is not working?
We are not working.
You are working. Are you working? You are not working?
They are working? Are they working? They are not working.
e.g. I go to school every day. He is always like that. Where do you live? What do you do here?
一般现在时的构成形式有: 肯定句, 疑问句, 否定句, 疑问否定式
肯定句
I am a worker.
He/She/It is a worker. We are workers.