新概念英语资料,讲义课件,练习

sth.is valuable/sth.is precious

precious adj. 珍贵的（带有一定的感情色彩） precious photo 珍贵的照片 -less 表否定;

priceless adj. 没有价格的, 无价的 valueless adj. 没有价值, 不足道的 worthless adj. 无价值的

★diamond n. 钻石diamond ring 钻石戒指 precious stone 宝石；crystal 水晶；jade 玉 ★steal（stole，stolen） v. 偷 ① vt.&vi. 偷盗，行窃

英语中―偷‖用steal和rob来表达，宾语是物，用steal；宾语是人，用rob；跟地点相连，也用rob steal sth. 偷(某物)My wallet was stolen. rob sb. 抢(某人) rob the bank ② vt. 巧妙地占用，偷偷地弄到手

He has stolen away Mary‘s heart. 他已赢得玛丽的芳心。③ vi. 偷偷地行动，悄悄靠近

He stole into the room. 他悄悄地进了房间。 ★main adj. 主要的 main building；main street；main sentence；main idea main不能与人连用

★guard n. 警戒, 守卫

life guard 救生员/body guard 保镖 keep guard 守望，警戒

They kept a close guard over the thieves. 他们对小偷们严加看管。stand guard 站岗，放哨 【课文讲解】

1、The plane was late and detectives were waiting at the airport all morning.

all一般直接加表示时间的单数名词构成副词短语，如：all day，all night，all week，all winter，all year等。但不说all hour。

whole在表达同样的意思时一般要加冠词或数词，如a whole day/year，two whole weeks。 all morning=all the morning

detectives 没有强调一些侦探或者那些侦探, 强调侦探这种人，笼统感念, 可不加some, the

2、A few hours earlier, someone had told the police that thieves would try to steal the diamonds. a few hours earlier 几个小时以前 = a few hours before/a few hours ago

would +do 过去将来时,间接方式, 转述, 站在过去看未来

3、When the plane arrived, some of the detectives were waiting inside the main building while others

were waiting on the airfield. 代词others常常和some连用，表示―有些（人）……，也有些（人）……‖或―有的……，其余的……‖ one…the other… 一个……另一个…… some…others… 一些……另一些……

Some students are very hard-working, others are not. others=other+名词复数 5、Two men took the parcel off the plane and carried it into the Customs House.

take sth. off…=take sth. away from…

and carried it into…carried 表示看得很重 Customs House 海关

6、While two detectives were keeping guard at the door, two others opened the parcel. To their surprise, the precious parcel was full of stones and sand!

…were keeping guard at the door, two others opened the parcel.

表面上是分工, 两个动作同时发生, 不是同时开始同时结束, 延续时间不一致, 长一点时间的动作用进行时态, 短时间的动作用过去时.

When someone knocked at the door, I was having dinner.

keep guard守卫

They kept a close guard over the thieves. at the door 在门边(固定搭配) two others=two other detectives to one's surprise,让某人惊讶的是

To one‘s +表情绪名词to one's joy/to one's excitement be full of ...装满My bag was full of books. 【Key structures】 过去进行时

过去进行时的构成：be的过去式+现在分词

过去进行时和一般过去时经常同在一个句子里使用。过去进行时表示过去正在进行的动作或情况，一般过去时则表示比较短暂的动作或事件。正在进行中的动作或情况往往由连词when，while，as，just as等引导。

when，while 当……时候（强调动作同时发生） while+从句, 动词一定是延续性动词 when+延续性动词/瞬间动词

while能用when代替，但是when却不一定能用while代替。while通常只引导持续时间较长的动作，并且主句和从句可以同时用过去进行时，而when和as一般不这么用。

John was watching TV while his wife was talking with a neighbour over the phone.