expressions – 'since' and 'for'.

表達式--"自 "和 "為"。

These two time expressions are commonly confused in English.

這兩種時間表達方式在英語中經常被混淆。

But after watching this video, you'll have a good understanding of the difference and when to use these words.

但看完這段視頻後，你會很好地理解這些詞的區別和何時使用。

Let's get started.

讓我們開始吧。

Let's start with 'since'

讓我們從 "自從 "開始

'since' shows when a past action first started.

'since'顯示一個過去的動作是什麼時候開始的。

We always need a starting point with 'since'

我們總是需要一個以 "自 "為起點的出發點

so when you use 'since', you always need a specific time expression.

所以當你使用'since'時，你總是需要一個具體的時間表達。

Let's take a look at some example sentences.

讓我們來看看一些例子的句子。

The first sentence says,

第一句話說。

'I have been working since 8 o'clock this morning.'

'我從今早8點就開始工作了。

You'll notice that the specific time expression comes after 'since'.

你會注意到，具體的時間表達是在 "自 "之後。

And it shows when this person started working.

而且它顯示了這個人是什麼時候開始工作的。

The next sentence says,

下一句話說。

'She has been on a diet since August.'

'她從八月開始就一直在節食。

The specific time expression here is August

這裡的具體時間表達是八月

and it comes after 'since'.

而它是在 "自 "之後。

It shows when she started dieting.

這表明她是什麼時候開始節食的。

Okay, now, I will talk about 'for'.

好了，現在，我將談談 "為"。

We use 'for' to express a length of time in English.

在英語中我們用'for'來表達時間的長短。

It is used to express duration or how long something has happened.

它用於表達持續時間或某事發生了多長時間。

Let's take a look at some examples.

讓我們看一下一些例子。

The first sentence says,

第一句話說。

'I have been working for five hours.'

'我已經工作了五個小時。

In this case, we have a duration five hours

在這種情況下，我們有一個持續時間五小時

and it comes after 'for'.

而它是在 "為 "的後面。

The next sentence says,

下一句話說。

'She has been on a diet for three months'.

'她已經節食三個月了'。

Again, we have three months which shows the duration

同樣，我們有三個月的時間，這表明持續時間

- how long she has been on a diet.

- 她已經節食了多長時間。

Again, notice it comes after the word 'for'.

再次，注意它是在 "為 "字之後。

Now, let's do a checkup.

現在，讓我們做個檢查。

In this conversation, there are two sentences.

在這段對話中，有兩個句子。

In one of the sentences, we should use 'since'

在其中一個句子中，我們應該使用 "自從"。

and in the other we should use 'for'.

而在另一種情況下，我們應該使用'for'。

Take a moment to think about where we use 'since' and 'for'.

花點時間想一想我們在哪裡使用 "自 "和 "為"。

'A' says,

A'說。

'Have you been working here _blank_ 2008?'

'你在這裡工作了嗎_blank_2008？

You'll notice the specific time expression '2008'.

你會注意到具體的時間表達'2008年'。

Remember, when we use a specific time expression,

請記住，當我們使用一個特定的時間表達時。

we put 'since' before the expression.

我們在表達式前加上 "自 "字。

So 'A' says,

所以'A'說。

'Have you been working here since 2008?'

'你從2008年開始就在這裡工作了嗎？

'B' says, 'No, I've only been working here _blank_ two weeks.'

'B'說，'不，我只在這裡工作了_空白_兩個星期。

'two weeks' is a duration.

'兩週'是一個期限。

It shows how long this action has been happening.

這表明這一行動已經發生了多長時間。

So the best answer here is 'for'.

是以，這裡的最佳答案是 "為"。

'No, I've only been working here for two weeks.'

'不，我只在這裡工作了兩個星期。

So let's take a look at the whole conversation.

是以，讓我們來看看整個對話。

'A' says,

A'說。

'Have you been working here since 2008?'

'你從2008年開始就在這裡工作了嗎？

And 'B' says, 'No, I've only been working here for two weeks.'

而'B'說，'不，我只在這裡工作了兩個星期。

Now you know the difference between 'since' and 'for'.

現在你知道 "自 "和 "為 "的區別了。

Be sure to practice these two time expressions.

請務必練習這兩種時間表達方式。

They're very important to properly express time and duration in English.

它們對於在英語中正確表達時間和持續時間非常重要。

Thank you guys so much for watching.

非常感謝你們的觀看。

And I'll see you in the next video.

我們將在下一個視頻中見。