二、简单句的核心变化

(一)谓语动词的变化

n. + v.

• 动词的时态
• 动词的语态
• 动词的情态
• 动词的否定

一般过去时 Simple Past

形式：V.过去式(did/was/were)
用法：过去的事、过去的动作(无关现在)
例子：

• He was a student.
• He liked music.
• She had a boyfriend.

V.过去式   丨V.过去分词
一般过去时  丨完成时
                  丨被动语态
                  丨不做谓语

一般现在时 Simple Present

形式：V.原型/V.第三人称单数(do/does)
You like English.
He likes English.
用法：

1.现在经常性习惯性的动作

We have the English class every day.
He often gets up late.

2.现在的状态

I am a teacher.
We are in China.

3.永恒

The earth is round.
The earth moves around the sun.
Knowledge is power.
Practice makes perfect.

补充：
与频率连用(every,once a week,twice a month,three times a ...)
always
usually,often,frequently
sometimes,occasionally
seldom,hardly
never

一般将来时 Simple Future

形式：Will/am/is/are going to + V.原型
用法：将来的事(现在的将来)
I will make a new plan tomorrow.
We are going to study abroad next year.

过去将来时 Past Future

形式：Would/was/were going to + V.原型
用法：将来的事(过去的将来)
I said that I would become a cook in the future.
Tony finished his work,and then he would leave for London.

三种进行时 Progressive Tense

At 10 o'clock yesterday some students were taking an exam in their classrooms.

We are taking about the water pollution.

A great many candidates will be meeting here at this time tomorrow.

现在完成时 Present Perfect Tense

形式：have/has + done
用法：
现在全部完成 He has left.
现在部分完成 We have studied English for ten years.

过去完成时 Past Perfect Tense

形式：had + done
用法：过去的之前
When he got there,she had left.She was not there.

完成进行时 = “完成” + “进行” =**时间的之前，强调进行的过程

They ____ on the program for almost one week before I joined them, and now we are still working on it as no good results ____ so far.
A.have been working;have come out
B.had worked;came out
C.had been working;have come out
D.have worked;are coming out
显示答案 答案：C