简单式
- 过去时——表示在过去某个时间发生
-
Verb-ed
- 例句:
The U.S. established diplomatic relations with the P.R.C. in 1979.
- 例句:
-
was/were + verb-ed，ed表达被动意味
- 例句:
The movable print was introduced to England in 1485.
- 例句:
-
was/were + verb-ing，ing表达一种持续性/当时正在进行
- 例句：
I was visiting clients the whole yesterday.
I was watching TV when I heard the doorbell.
- 例句：
- 现在时——表示现在发生的/永恒不变的
-
Verb(s)
- 例句：
All mothers love their children.
- 例句：
-
am/is/are + verb-ing，ing表达持续性/正在进行
- 例句：
7-Eleven is selling big cokes at a discount this month.
- 例句：
-
am/is/are + being + verb-ed，being+verb-ed表示持续被动
- 例句：
According to the NASA survey, the ozone layer is being depleted.
- 例句：
- 将来时——表示在将来会发生
-
will + be
- 例句：
There will be a major election in March.
- 例句：
-
will + be + verb-ed，ed表达被动意味
- 例句：
The building will be razed next month.
- 例句：
-
will + be + verb-ing，ing表达持续性/正在进行
- 例句：
Don't call me at 6 am tomorrow. I'll still be sleeping at then.
- 例句：
完成式
- 现在时——区间动作，表示截止时间是现在
-
have(has) + verb-ed
- 例句：
I'm sure I have seen this face somewhere.
- 例句：
-
have(has) + been + verb-ing，ing表示过去开始一直持续到现在
- 例句：
We have been working overtime for a week to fill your order.
- 例句：
-
have(has) + been + verb-ed，ed表示被动意味
- 例句：
The house has been redecorated twice since they moved in.
- 例句：
- 过去时——区间动作，表示在过去的某个时间截止
- had + verb-ed
- 例句：
Many soldiers had died from pneumonia before the discovery of penicillin.
- 例句：
- had + been + verb-ed，ed表示被动意味
- 例句：
Japan had not been defeated yet by the time Germany surrendered unconditionally.
- 例句：
- had + been + verb-ing，ing表示持续的意味
- 例句：
I had been smoking three packs of cigarettes a day before I decided to quit.
- 例句：
- 将来时
-
will + have(has) + verb-ed
- 例句：
Next July, I will have worked here for 2 years.
- 例句：
-
will + have(has) + been + verb-ing，ing表示持续的意味
- 例句：
In two more minutes, she will have been talking on the phone for three hours.
- 例句：
-
will + have(has) + been + verb-ed，ed表示被动意味
- 例句：
Come back at 5:00 p.m., your car will have been fixed by then.
- 例句：
知识导图
练习
- There ____ some very bad storms recently.
a. is
b. are
c. have been
d. have - Our city ____ a great deal. It doesn't resemble the one three years ago.
a. changes
b. have changed
c. is changing
d. will change
网友评论