occasion可数吗

C occasion 作可数名词时，意为“时机”，作不可数名词时，意为“必要”，本题中occasion意为“必要”。从句语法结构上看，本句中用opportunity(难得的)机会，chance（偶然的）机会均可，但按逻辑意思，应用occasion.

choice是不可数名词吗？

in

Sydney,

you'll

find

a

broadchoice

of

opera,

drama,

classical

concerts,

rock

concerts

--

there's

toomuchchoicereally!

在本句中，第一个choice是可数名词，表示“在多个选项时，作出选择的一次行为”。而第二个choice是不可数名词，表示“可供选择的机会”。

例如：新牛津英汉双解大词典

■an

act

of

selecting

or

making

a

decision

when

faced

with

two

or

more

possibilities选择；抉择

the

choice

between

good

and

evil.

善恶间的抉择。

■[mass

noun]the

right

or

ability

to

make,

or

possibility

of

making,

such

a

selection

选择权；选择能力；可供选择的机会Ihad

to

do

it,

I

had

no

choice.没有选择，我必须做。

■a

range

of

possibilities

from

which

one

or

more

may

beselected选择范围

you

can

have

a

sofa

made

to

order

in

a

choice

of

over

fortyfabrics.

你可以定做一只沙发，有40多种面料可供选择。

■a

course

of

action,

thing,

or

person

which

is

selected

or

decidedupon

选中的行动步骤；入选物；入选者

这个磁盘驱动器是你电脑的完美选择。

有关英语的问题

there be用法

一、构成：There be ...句型表示的是 “某处有(存在)某人或某物”，其结构为There be(is，are，was, were )+名词+地点状语。例如：

There are fifty-two students in our class.

二、各种句式：

否定句：There be句型否定句式的构成和含有be动词的其它句型一样，在be后加上“not”。也可用“no”来表示。即：no + n.（名词）= not a\an\any + n.（名词）。注意：no + n.（可数名词单数）= not a\an + n.（可数名词单数）；no + n.（可数名词复数）= not any + n.（可数名词复数）；no + n.（不可数名词）= not any + n.（不可数名词）。例如：

There is an orange in her bag.

→There isn’t an orange in her bag.

→There is no orange in her bag.

一般疑问句：There be结构的一般疑问句变化只需把be动词移到句首，再在句尾加上问号即可。例如：There is some money in her handbag. → Is there any money in her handbag? (疑问句和否定句中，some改为any, something改为anything.)

特殊疑问句：

There be句型的特殊疑问句有以下三种形式：

①对主语提问：当主语是人时，用 “Who’s + 介词短语?”；当主语是物时，用 “What’s + 介词短语?”。其中there在口语中常常省略。注意：无论原句的主语是单数还是复数，对其提问时一般都用be的单数形式(回答时却要根据实际情况来决定)。如： There is a bird in the tree.→What’s in the tree? There are some bikes over there. →What’s over there?

There is a little girl in the room. →Who is in the room?

②对地点状语提问：用 “Where is \ are + 主语?”表示（注意其答语变化）：例如：

There are four children in the classroom.

→Where are the four children?—They’ re in the classroom. ③对数量提问：一般有两种提问方式：

如果主语是可数名词，无论是单数还是复数，都用“How many +可数名词复数 + are there + 介词短语？”表示：

There are twelve months in a year.

→How many months are there in a year?

如果主语是不可数名词，则用“ How much + 不可数名词 + is there + 介词短语？”表示：

There is some money in my purse. How much money is there in

your purse?

反意疑问句：There be或There加其它动词，其反意疑问句一律用…there? 例如：

There is a beautiful girl in the garden, isn’t there?

There used to be no school here, used there \did there?

英语语法

1. 有这种说法：possibility of (doing) sth. 意思是“……的可能性”。

2.wander在这里作及物动词用，宾语就是an hour。

3. 一场雨a rain。相似的说法：a wind一阵风, a water一种水，等等。

it 指winter，作介词with的宾语。介宾短语with it 作状语，修饰brought。brought的宾语是clouds。

4. dreadful表示客观事物有令人恐惧的特点，to 表示方向。be dreadful to me使我感到恐惧。

coming在这里是动名词，属于名词一类，当然可以加the。又如：Would you mind my opening the window?你介意我开窗户吗？/ the opening of sth.某事的开幕式

5. for me 和to me都是“对我来说”，但意思有点不同。前者含有“为”的意思，表示一种目的。

介词是有规律的，但介词的用法十分复杂，只能多领会。建议买一本完全用英语解释的词典琢磨琢磨。