Appearance
Unit 7 — Present Perfect 1
I have done — 现在完成时
1. 核心结构
现在完成时的基本结构:
have / has + past participle(过去分词)
| 主语 | 助动词 | 过去分词 |
|---|---|---|
| I / we / they / you | have | finished / lost / done / been ... |
| he / she / it | has | finished / lost / done / been ... |
例如:
I have finished.
He has lost his key.
She has done the work.
They have been there.
2. 缩写形式
| 完整形式 | 缩写 |
|---|---|
| I have | I've |
| we have | we've |
| you have | you've |
| they have | they've |
| he has | he's |
| she has | she's |
| it has | it's |
例如:
He has lost his key.
可以缩写为:
He's lost his key.
注意:
这里:
He's = He has
不是:
He is
因为后面跟的是:
lost(过去分词)
3. Example — I've lost my key
Tom 找不到自己的钥匙。
Tom can't find his key.
所以他说:
I've lost my key.
也就是:
I have lost my key.
或者描述 Tom:
He's lost his key.
= He has lost his key.
4. has lost 到底表达什么?
He has lost his key.
意思不是单纯:
他过去把钥匙弄丢了。
更重要的是:
他把钥匙弄丢了,而且现在仍然没有钥匙。
时间关系:
PAST NOW
│ │
● lost the key ─────────────▶│
↓
doesn't have it now
所以:
past action → result NOW
过去发生的事情:
lost his key
产生了现在的结果:
he doesn't have it now
5. Present Perfect 的核心时间观念
现在完成时经常表达:
过去发生了一件事情,而这个事情和现在存在联系。
时间轴:
PAST ───────●────────────────▶ NOW
│ │
ACTION RESULT
│ │
lost key can't find it
所以理解:
have done = 过去发生 + 现在有结果
6. 过去分词 Past Participle
现在完成时使用:
have / has + 过去分词
规则动词
规则动词的过去分词通常以:
-ed
结尾。
| 原形 | 过去式 | 过去分词 |
|---|---|---|
| finish | finished | finished |
| decide | decided | decided |
| work | worked | worked |
| clean | cleaned | cleaned |
| open | opened | opened |
例如:
I've finished my work.
不规则动词
很多常见动词是不规则的:
| 原形 | 过去式 | 过去分词 |
|---|---|---|
| lose | lost | lost |
| do | did | done |
| write | wrote | written |
| be | was / were | been |
| see | saw | seen |
| go | went | gone |
| forget | forgot | forgotten |
所以:
❌ I have did it.
应该是:
✅ I have done it.
7. 第一种常见用法:告诉别人「刚发生的新情况」
当我们说:
something has happened
通常是在告诉别人一个:
new information(新情况)
8. Example — cut
Ow! I've cut my finger.
哎呀!我把手指割伤了。
为什么使用现在完成时?
因为这个事情:
刚刚发生
而且:
现在手指仍然受伤。
时间轴:
刚才 NOW
│ │
● cut finger ───────────────────▶│
↓
finger hurts
所以关注的不是:
“什么时候割伤的?”
而是:
“现在手指受伤了。”
9. Example — accident
The road is closed.
道路关闭了。
为什么?
There's been an accident.
= There has been an accident.
发生了一起事故。
逻辑:
accident ───────────────────────▶ NOW
│
↓
road is closed
过去:
an accident happened
现在:
the road is closed
所以使用:
There has been an accident.
10. Example — arrested
Police have arrested two men in connection with the robbery.
警方已经逮捕了两名与抢劫案有关的男子。
这里是在告诉别人:
一个新的、当前相关的信息。
重点:
现在这两个人已经被警方抓到了。
11. New Information 总结
| New information | 现在的意义 |
|---|---|
| I've cut my finger. | 现在手受伤了 |
| There's been an accident. | 现在道路受到影响 |
| Police have arrested two men. | 现在两人已经被捕 |
所以:
Present Perfect 很常用于宣布一个刚发生、现在仍然重要的新情况。
12. 第二种核心用法:过去动作产生现在结果
图片中的核心规则:
When we use the present perfect, there is a connection with now.
也就是:
使用现在完成时时,过去和现在存在联系。
13. Example — lost
Tom has lost his key.
Tom 把钥匙弄丢了。
现在的结果:
He doesn't have it now.
所以:
PAST NOW
│ │
● lost key ──────────────────▶│
↓
no key now
14. Example — forgotten
He told me his name, but I've forgotten it.
他告诉过我他的名字,但是我忘了。
过去:
He told me his name.
后来:
I forgot it.
现在:
I can't remember it now.
时间轴:
told me → forgot ─────────────▶ NOW
↓
can't remember
所以:
I've forgotten it.
重点不是“忘记”这个历史事件本身。
而是:
现在想不起来。
15. Example — hasn't gone out
Sally is still here.
Sally 现在还在这里。
所以:
She hasn't gone out.
她还没有出去。
现在的结果:
She is here now.
时间轴:
PAST ────────────────────────▶ NOW
✕ gone out │
↓
still here
因此:
hasn't gone out
= 截至现在,她没有出去。
16. Example — Have you seen my bag?
I can't find my bag.
我找不到我的包。
于是问:
Have you seen it?
你看到过它吗?
这个问题真正关心的是:
你现在知道我的包在哪里吗?
也就是:
Do you know where it is now?
所以:
Have you seen it?
并不是单纯问:
“你过去某个时候看到了吗?”
而是借过去的经历解决:
我现在找不到包
这个问题。
17. 四个例句直接对比
| Present Perfect | Past Event | Result NOW |
|---|---|---|
| Tom has lost his key. | 钥匙丢了 | 现在没有钥匙 |
| I've forgotten his name. | 忘记了名字 | 现在想不起来 |
| Sally hasn't gone out. | 没有出去 | 现在仍然在这里 |
| Have you seen my bag? | 有没有见过包 | 现在知道它在哪里吗? |
核心:
PAST ACTION → NOW RESULT
18. 一个非常重要的思维方式
不要把:
I have done
机械翻译为:
「我已经做了」
因为中文里的“已经”并不能完整解释现在完成时。
更准确的思维是:
过去发生了什么 → 它对现在造成了什么?
例如:
I've lost my key.
不要只理解:
我已经把钥匙弄丢了。
更重要的是:
所以我现在没有钥匙。
I've forgotten his name.
不是只说:
我曾经忘掉过他的名字。
而是:
所以我现在想不起来。
There's been an accident.
不是单纯记录:
过去发生过事故。
而是:
发生事故了,现在这个情况仍然重要。
19. gone to vs been to
这一页还有一个非常重要的区别:
has gone to
vs
has been to
20. has gone to
James is on holiday.
James 正在度假。
He has gone to Italy.
他去意大利了。
这里:
has gone to Italy
意味着:
他已经去了意大利,现在在那里,或者正在去那里的路上。
时间轴:
HOME ───── go to Italy ─────────▶ NOW
↓
in Italy / on the way
重点:
去了,还没回来。
21. has been to
Amy is back home now.
Amy 现在已经回家了。
She has been to Italy.
她去过意大利。
这里:
has been to Italy
意味着:
她去了意大利,但是现在已经回来了。
时间轴:
HOME → ITALY → HOME
│
▼
NOW
重点:
去过,而且已经回来。
22. gone to vs been to 核心对比
| 表达 | 意思 | 人现在在哪里? |
|---|---|---|
| has gone to Italy | 去意大利了 | 在意大利 / 去意大利路上 |
| has been to Italy | 去过意大利 | 已经回来了 |
例如:
Where's Tom?
He's gone to the supermarket.
Tom 去超市了。
→ 现在不在这里。
Have you ever been to Japan?
你去过日本吗?
→ 问人生经历,默认:
现在已经不在日本。
23. gone / been 时间轴
has gone to
HERE ─────────────────────▶ ITALY
│
▼
NOW
去了 → 没回来
has been to
HERE ─────▶ ITALY ─────▶ HERE
│
▼
NOW
去过 → 已回来
24. 图片中的全部例句整理
| Example | 核心含义 |
|---|---|
| I've lost my key. | 钥匙现在不在手里 |
| I've cut my finger. | 手指现在受伤 |
| There's been an accident. | 事故现在造成影响 |
| Police have arrested two men. | 两人现在已经被捕 |
| Tom has lost his key. | 现在没有钥匙 |
| I've forgotten his name. | 现在想不起来 |
| Sally hasn't gone out. | 现在仍然在这里 |
| Have you seen my bag? | 现在知道包在哪里吗? |
| He has gone to Italy. | 去了意大利,还没回来 |
| She has been to Italy. | 去过意大利,现在已经回来 |
25. Present Perfect 的核心不是「过去」
虽然动作:
发生在过去
但是说话者真正站的位置是:
NOW
例如:
I've lost my key.
思维不是:
PAST
↓
LOST
而是:
PAST NOW
● LOST ───────────────────────▶●
↑
NO KEY
所以:
过去只是原因,现在才是关注点。
26. 和 Past Simple 的初步区别
Present Perfect
I've lost my key.
重点:
我现在没有钥匙。
时间:
LOST ─────────────────────────▶ NOW
↑
RESULT
Past Simple
I lost my key yesterday.
重点:
昨天发生了一件事情:我丢了钥匙。
时间:
YESTERDAY NOW
● │
lost key │
这里关注:
过去什么时候发生了什么。
27. 最重要的判断问题
看到一个句子时,可以问:
这句话是在告诉我一个“过去的历史事件”,还是在告诉我一个“现在的情况”?
如果重点是:
NOW
通常就很可能使用:
Present Perfect
例如:
I've lost my key.
真正的信息:
I don't have my key now.
I've forgotten his name.
真正的信息:
I can't remember it now.
Sally hasn't gone out.
真正的信息:
She's still here now.
Have you seen my bag?
真正的问题:
Do you know where it is now?
28. Unit 7 的核心公式
结构
have / has + past participle
时间思维
PAST EVENT → NOW RESULT
时间轴:
PAST ───────────●──────────────▶ NOW
│ │
EVENT RESULT
例如:
lose key ──────────────────────▶ no key
forget name ───────────────────▶ can't remember
accident ──────────────────────▶ road closed
not go out ────────────────────▶ still here
29. 一句话记忆
Present Perfect — I have done
过去发生了一件事,但我现在告诉你,是因为它和 NOW 有关系。
结构:
have / has + done
核心:
PAST → NOW
例如:
I've lost my key.
不要只记:
「我已经丢了钥匙。」
要理解成:
「钥匙丢了,所以我现在没有钥匙。」
最终思维模型
NOW
│
▼
PAST ───── EVENT ────●
│ ↑
└────────┘
RESULT
Present Perfect
What has happened?
关注:
发生了什么,以至于现在变成这样?
所以:
I've lost my key.
= 过去:lost
→ 现在:I don't have it
I've forgotten his name.
= 过去:forgotten
→ 现在:I can't remember it
There's been an accident.
= 过去:accident happened
→ 现在:the road is closed
最终记住:
Present Perfect 1 = 过去是原因,NOW 是重点。