when 用法

动词不定式中的省略现象

动词不定式中的省略现象可分为两种情况,一是动词不定式符号to后的动词部分的省略;二是动词不定式符号to的省略.

一,省略动词不定式符号to后的动词部分的情况

1.一些表示心理活动,情感态度的动词或短语,如expect \want \hope \wish \love \hate \decide \plan \mean \try \would like \be ready \be afraid \be glad等后,动词不定式省略to后面的动词部分,但保留to.例如:

(1)-I 'll be away on a business trip.Would you mind looking after my dog

-Not at all .I'd be glad to.

(2)-Will you go with me

-Well ,I 'd like to.

(3)-Will you go home tomorrow

-No.I 'm going to a lecture,or at least I am planning to.

2.不定式作宾语补足语时,省略to后的动词部分,即用to代替整个不定式.例如:

(1)The boy wanted to ride his bicycle in the street but his mother told him not to.

(2)You'd better finish the job on time if he ordered you to.

3.在一些情态动词或助动词ought to \have to \used to \be able to后.例如:

(1)-Must I go now

-No.You don 't have to.

(2)-Are you planning to see your grandfather

-No.But I ought to.

不消费日

是抗议消费主义的一个非正式日子，由加拿大温哥华艺术家特德·戴夫（Ted Dave）于1992年发起，加拿大《Adbusters》杂志推动。参加者24小时拒绝购买任何商品，显示消费者力量。这项活动是要唤起公众关注第一世界浪费资源的消费习惯。参加者有的也参与文化干扰活动，例如Whirl-Mart和别的激进表达方式。这一天也用来反物质主义和从众心理.

在美国和加拿大，这项活动在美国感恩节后一天举行。这天被称为商店的“黑色星期五”，是美国最繁忙的购物日之一，但对加拿大则不然，不过为了同时举行而定于同一天。其他国家的示威活动在后一天举行。

并列分句中的when 表示突然发生某事“正在那时、突然”.(when=and at that time)

b e doing …….when…… 正在做……，这时/突然……

b e about to do…….when…….. 正要做…….，这时/突然……

had (just) done……when…… 刚做完…….，这时/突然……

when之前的分句使用过去完成时，sb had hardly/scarcely/barely…when表示刚刚完成前一个动作，就在这时后一个动作发生了

I had hardly opened the door when the man hit me.我刚打开门，那个人就打了我一拳。

I was reading a book attentively when an old friend came to see me.我正在全神贯注地读一本书，忽然一位老友来访。

I was about to swim in the river when the guide told me there was man-eating fish in it.我正要下河游泳这时导游告诉我河里有食人鱼。

.I was reading a book in the room when a dog ran in

Hardly had he arrived when he began to work.( hardly.had +主语+过去分词。。when +主语+谓语。）

1 I had finished my homework and ___ watch the Olympics when the powe r was cut off.

A was going to

B was about to

C was to

D would

2 we were getting in the wheat _____ suddenly it poured with rain.

A while

B when

C as

D before

3 she had just finished her homework _____ her mother asked her to practi ce playing the piano yesterday.

A when

B while

C after

D since

4 he was about to tell me the secret _____ someone patted him on the sho ulder.

A as

B until

C while

D when