一起烤雅思 1-7b ENVIRO-LOO

steelver (白龍) 路人甲
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发表于:2012-05-03 12:00 [只看楼主] [划词开启]
近期节目传送门~ Episode2 α β Episode3 α β Episode4 α β Episode5 α β Episode6 α β
收到热心童鞋的建议,音频将分为小节,方便大家逐页对照,也可以自由轻松的调整学习进度^_^ 碰到不懂的单词请召唤小D喔~

点击查看大图
OK. So in formal writing, we use the passive form for processes. But David doesn’t always use the passive, because he’s having a conversation with someone.

Let’s look at one of David’s more informal sentences, and see how we could change it into a more formal description.

There’s a containment vessel for the solids and from the bottom of the solids, you drain off the liquid.

He says ‘from the bottom of the solids you drain off the liquid’. Let’s look at the main part of that sentence.

‘You drain off the liquid’.

The verb is ‘drain off’.

In a passive sentence, we’d say ‘is drained off’, the ‘past participle’ with the present tense form of ‘to be’.

To form the passive, we also need change the sentence around.

Most English sentences use the active form – that’s ‘subject verb object’. But in the passive, sentences begin with the object of the verb – ‘object verb subject’.

In this sentence, we know that ‘drain off’ is the verb, ‘you’ is the subject and ‘the liquid’ is the object.

So to form a passive sentence, we’ll need to turn the sentence around into ‘object verb subject’. Notice that we add the word ‘by’.

‘The liquid is drained off by you.’

But in a process, we don’t need to include the agent of the verb, so it usually gets left
out.

Our new, more formal sentence reads:

‘The liquid is drained off.’

So let’s go back to that full sentence ‘From the bottom of the solids, you drain off the liquid.’

‘From the bottom of the solids, the liquid is drained off.’

Here’s another one.

We can calculate the amount of liquid that’s gone in.

We can calculate the amount of liquid.

The subject is ‘we’. This will be dropped in our passive sentence.

The object is ‘the amount of liquid’.

The verb is ‘can calculate’.

‘Calculate’ has the past participle ‘calculated’.

When there are auxiliary verbs like ‘can’, we use the infinitive form of the verb ‘to be’.

So the full verb phrase ‘can calculate’ becomes ‘can be calculated’.

Remember that a passive sentence starts with the ‘object’, then the ‘verb’, so:

‘We can calculate the amount of liquid.’

becomes:

‘The amount of liquid can be calculated.’


OK, let's finish today by testing you on the passive.

Listen to the steps in a simple process.

This is how you make a cup of coffee. It’s in a conversational style.

You fill the kettle with water.
You turn on the kettle.
You boil the kettle.
You pour the hot water into a mug.
You add some sugar.
Then you can drink it.

OK. Let’s start at the beginning.

You fill the kettle with water.
What’s the verb? ‘Fill’. The subject? ‘You’. The object? ‘’The kettle’.
The passive verb is ‘is filled’.
The new sentence is:
‘The kettle is filled with water.’

See if you can do the next one …

‘You turn on the kettle.’
The verb is ‘turn on’.
The subject is ‘you’.
The object is ‘the kettle’.
‘The kettle is turned on.’
‘You boil the water.’
‘The water is boiled.’
‘You pour the hot water into a mug.’
‘The hot water is poured into a mug.’
‘You add some sugar.’
‘Some sugar is added.’
‘Then you can drink it.’
‘Then it can be drunk.’

But we’d usually say,
‘Then it’s ready to be drunk.’

So let’s go through that again.
‘The kettle is filled with water.’
‘The kettle is turned on.’
‘The water is boiled.’
‘The hot water is poured into a mug.’
‘Some sugar is added.’
‘Then it’s ready to be drunk.’

And I think I’ll go and make a cup of coffee right now. Don't forget to practice these active and passive sentences.
And I'll see you next time for Study English. Bye.


点击查看大图 ~STUDY NOTES~
上次讲的是规则的被动结构,其实就是单词的过去式变格。那还有不规则的单词呐~补张表就明白了
点击查看大图
Passive constructions can only be made from transitive verbs because these verbs
can have objects. Examples of verbs that cannot occur with passive constructions
include: happen, occur, seem, die, live.被动结构只能用于及物动词,因为只有及物动词才及物…以下这些单词无法“被动” happen, occur, seem, die, live.

今天的作业来啦,回复的时候请勾选“仅楼主可见”喔,答案回复可见

The following is a description of a procedure in conducting a survey. Select a verb below and using the past passive form, write the appropriate verb in the
blank spaces in each sentence.

write   give   analyse   conduct   publish
distribute   select   collate   transfer   request

In August 2004, a marketing survey __________ among 25 overseas postgraduate business students. Firstly, the three-page questionnaires __________ to the students in the computer lab. After the instructions __________, the students __________ to enter their answers directly onto a spreadsheet. Then the information from the spreadsheets __________ to a database. This data __________ and __________ over a two-day period. The main points __________ and two reports __________. Finally, the reports __________ on the intranet for the benefit of the students.



-----------以下内容回复可见-----------

答题区

1、奖钱钱的选择题还是不能浪费呀~那,问题来了,mug是什么意思?
最后编辑于:2012-05-21 16:43

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