1. I wish you were here.我希望你在这儿。
   Wish后面跟宾语从句，谓语部分要用虚拟语气形式.。
   I wish I were as clever as you.(现在)
   How he wish that he had passed the exam.(过去)
   How I wish I could have a good holiday.( 将来)
2. It’s the biggest desert in the world –about the size of the US!
    它是世界上最大的沙漠，大约是美国的面积。
   Our classroom is twice bigger than theirs.
   Our classroom is three times as big as theirs.
   Our classroom is three times the size of theirs.
3. We eat and drink whatever they do .
   whatever  adv./conj.可引导名词性从句和状语从句
   You can get whatever you need here.
   Whatever you do, you should try your best.
   =No matter what you do, you should try your best.
   类似的词如：wherever, whoever, whomever, whichever, however
   However (No matter how)great the difficulty is, you should try to overcome it.
   Wherever (No matter where)you go, you can take it with you.
4. Since (既然，因为)we’ll be walking every day for almost two weeks, I’ll need to buy a large strong, light backpack. 我们每天都需要徒步行走，长达近两周时间因此我得买一个改良大、质地牢、轻便的旅行背包。
5. We will walk across the land ,following the footprints of big animals .
我们将穿行于陆地，追寻大型动物的脚印。
6. We will try to get close as possible to the animals even though they are dangerous, so that I can take some good photos.
   尽管这些动物很危险，我们还是要试图尽可能地靠近他们，这样我就有可能拍到一些真正的好照片了。
   注意 even though =even if  即使 纵然；so that 因此
   I got up very early so that I could catch the early bus.
   I got up very early in order to=( so as to ) catch the early bus.
   He is such a good student that every teacher likes him.
7. I will make sure that we will get enough rest after sunset.
我将确保在日落之后能够得到充足的休息。
8. The whole trip will take six days.
整个行程将花六天时间。
9. You don’t want to run out.
   run out vi 用完，花光  use up vt
   I ran out of my money.
   My money ran out.
   I used up my money=My money was used up.
10. The sun rose ,as it always does, in a clear sky.
11. He was about to get off the camel when a child ran towards him.
   be about to do sth 即将/正要做某事 与when引导的从句连用
   I was about to go out when it began to rain.
12. …and eat and drink whatever they do, including cow’s blood! 他们吃喝什么我们也就吃喝什么，包括牛血！
   whatever, whichever, whoever, whomever可以引导名词性从句，也可以引导让步状语从句；引导让步状语从句时，可以换成no matter what/which/ who/whom，位置可以在主语之前，也可在主语之后。
Take whatever you want. 你可以拿你想要的任何东西。
Whoever breaks the law should be punished. （主语从句）= No matter who breaks the law, he will be punished.（让步状语从句）不管谁违反了法律都应受到惩罚。
We will complete the work on time, whatever happens (=no matter what happens). 不管发生什么事，我们将按时完成工作。
13. Just as we were about to turn off the radio and get into our sleeping bags,…就在我们准备关掉收音机，钻进帐篷时………
   be about to do= be on the point of doing/be just going to do“马上就要”，一般不与明确的时间状语连用。 
We were about to leave the house when the phone bell rang.我们正准备离开屋子，就在这时电话铃响了。