您正在看的高中一年级是:Computers。

　　A Useful eXPressions

　　1 in one’s opinion

　　In my opinion, six hours of TV each day is bad for your eyes.= I think (that) six hours of TV each day is bad for your eyes.

　　Tom, in my opinion, is the very man for this job.= I think (that ) Tom is the very man for this job.

　　2 a waste of money / time

　　Playing computer games too much is a waste of both money and time.

　　3 make a decision (on / about)

　　The company hasn’t made a decision on the price of these products. = The company hasn’t decided on the price of these products.

　　4 decide to do

　　The boy is seven now, so we decide to send him to the local primary school.

　　5 keep a record (of…)

　　Any file(文件) you want to use at a later time can be kept a record of by a computer.(注意：此句是将keep a record of…当一个整体来使用，并用了它的被动语态) = Any file you want to use at a later time can be recorded(v.) by a computer.

　　6 at one time

　　At one time, tens of strong men had to be employed to harvest rice in this field. However, just one machine can do all the work nowadays. = Once in the past, tens of strong men had to be …

　　7 make a plan for sth…:为。。。做安排/计划

　　Before you do it, make a good plan for the job.

　　Have you made any plan for the weekend?

　　8 thanks to …

　　Thanks to your suggestion, our team played very well in the match. = Because of your suggestion, our team played very well.

　　注意：thank to…一般要和表示结果的句子一起连用，如例句中的our team played very well in the match. 但是thank for…短语却一般单独成句，如Thanks for your suggestion!

　　9 bring down , go down /up

　　They will bring down the price of the potatoes. =They will make the price of the potatoes lower.

　　The price will go up / down, = The price will go higher / lower.

　　bring down 及物,主语是人;go up / down不及物,主语是物.

　　10 as a result, as a result of…

　　More and more milu deer are being sent to the park .As a result , it’s becoming too crowded with the animals. = More and more … , so it’s becoming too crowded with the animals.

　　As a result of higher prices, workers who are poorly paid are leading a harder life. = Because of higher prices, workers…

　　11 take up room (space) or one’s time: 占用空间或某人的时间

　　I’m sorry that I’ve taken up too much of your time.

　　The bed is so big that it takes up most of the space in the room.

　　12 change A into B: 使A 发生变化成为B /change A for B: 换A为B

　　When the temperature falls to 0 degree centigrade , the cold will change water into ice.

　　My newly-bought watch does not tell the right time , so I have to change it for a better one

　　B Sentence patterns:

　　1 I believe ( that )… = I think (that)…

　　I believe that the price will go up.

　　2 Although…, … / …, but…

　　Although it’s expensive, we decide to buy it. / It’s eXPensive, but we decide to buy it.

　　although , but两者不同时用。

　　3 It’s (not) important /necessary / good / wrong / a waste of money/…(for sb) to do sth

　　It’s necessary (for us ) to learn how to operate computers.

　　It’s a waste of money (for him) to buy a computer, because he has not any knowledge of it at all.

　　4 Sb hopes (that)…:某人希望(可能成为现实的愿望)

　　Sb wishes that… 表示无法实现或很难实现或根本就与现实相违背的愿望

　　I hope that he’ll be successful as a businessman. ( It’s possible that he’ll be successful as a businessman.)

　　I wish I could fly like a bird. ( It’s in fact impossible for me to fly like a bird.)