掌握每一个语法知识，会让你在学习英语的时候更加如鱼得水。下面是小编收集整理的初二英语《定冠词的常见用法》的必备知识点以供大家学习。

初二英语必备知识点：定冠词的常见用法

定冠词也出现在其他11种情况中，非同时注意不可。

⑴用在单数名词前面，以代表同类的人或物，如：

The ox is a useful animal for farmers.

This type of work is easier for the teacher than for the student.

但当涉及 man 和 woman 这两个名词时，一般上不必用 the ：

Man is mortal.

Woman differs from man in many ways.

⑵用在单数名词前面来表示有关名词的抽象概念，如：

Don't play the fool.

Peter is fond of the bottle.

⑶用在数目字前面，如：

Mr Li is somewhere in the 30s.

She was not yet born in the 50s.

⑷用在测量单位前面，以表示“每”(each/per)，如：

Some factory workers are paid by the hour.

This car usually does 15 kilometres to the litre.

⑸用在比较级形容词或副词之前，以加强其意义，如：

The teacher explained the idea again, but his students were none the wiser.

Your mind will function all the better if you have some time away from your work.

⑹用在“the more/better……the more/better……”结构里，如：

The more we practise, the more we improve.

The better the staff, the better the performance.

⑺用在乐器名称之前，如：

The piano sounds better than the organ.

⑻用在剧院、电影院之前，如：

Do you often go to the cinema?

Tom went to the Lido last week.

⑼用在四个方向之前，如：

The sun rises in the east and sets in the west.

⑽用在复数姓氏之前，以表示有关家人，如：

The Browns will visit us tonight.

⑾用在某些惯用语之前，如：

We know the ins and outs of the matter.

Compare the pros and cons before you make your decision.

初二英语必备知识点：疑问附加语isn't it

"John is smart, isn't it?"

这个疑问句里的附加语(question tag)对吗?如果是不对的话，错在哪里?

在公共场所或办公室里，只要稍为留心，不难听到“ isn't it ? ”这个附加语。这种疑问句是英文几种疑问句中的一种，主要的用途在强制答话人提供问话人心目中的答案。

这个疑问句有一定的格式，即：

·肯定叙述句(affirmative statement)+否定附加语(见例 ①及②)

·否定叙述句(negative statement)+肯定附加语(见例③及 ④)

①Mary is happy, isn't she?

②They will come, won't they?

③Mary isn't sad, is she?

④They won't come, will they?

此外，附加语中的代名词(pronoun)和助动词(auxiliary verb)必须和叙述句中的相符。

这类疑问句看似简单，其实容易出差错。其中一个错误便是附加语的时态(tense)不对，如：

⑤You could hardly expect him to help you, can you?

⑥The minister will talk about regional cooperation, wouldn't he ?

另外一种错误是助动词的错用，如：

⑦The clerks are working hard, don't they?

⑧Betty won't be a sportswoman, can she?

“isn't it”的滥用

最常见的错误来自“isn't it”的滥用，如：

⑨Jason likes this book very much , isn't it?

⑩She can sing well, isn't it?

11.Our team won, isn't it?

12.Young Singaporeans have become achievement - oriented , isn't it?

13.All our teachers are dedicated, isn't it?

14.They will go shopping on Sunday, isn't it?

这6个错误的附加语改正如下：

⑨Jason likes this book very much, doesn't he?

⑩She can sing well, can't she?

11.Our team won, didn't it?

12.Young Singaporeans have become achievement - oriented, haven't they?

13.All our teachers are dedicated, aren't they?

14.They will go shopping on Sunday, won't they?

"lsn't it ? "在下列3个句子中才是正确的用法：

15.It is fine today, isn't it?

16.That story book is interesting, isn't it?

17.It is worthwhile learning a second language well, isn't it?

现在再看看“John is smart , isn't it ?”错在哪里。很明显的，错在附加语里的代名词：应该是“he ”，不是“it”，全句如下：John is smart, isn't he?