think of…as 把……看作
move around the sun环绕太阳运转
the solid surface固体表面
produce the water vapor产生水蒸汽
make the earth’s atmosphere构成了地球的大气层
on the surface在表面
be different from…与……不同
go round the sun环绕太阳运转
1. Instead of spending your vacation on a bus, ... you may want to try hiking. Instead和instead 0f的用法
2. Say "Hi" / "Hello" / "Thanks" to sb. (for me) 问候的句型
3. Is anybody seeing you off? 进行时表将来
4. She struggled and struggled, and could not get on her feet. (= keep struggling)
5. You should not go rafting unless you know... unless引导条件状语从句，相当于if... not
6. By staying at..., tourists can help the villagers make money so that they can take care of the fiver and the birds. 目的状语从句
7. She was so surprised that she couldn't move. 结果状语从句
8. Tree after tree went down, cut down by water. 过去分词作状语
9. The next moment, the first wave swept her down, swallowing the garden. 现在分词作状语
10. However, before she could think twice, the water was upon her. It didn't take long before the building was destroyed. before的用法
1. 由连接词 that 引导的宾语从句
由连接词 that 引导宾语从句时， that 在句中不担任任何成分，在口语或非正式的文体中常被省去，但如从句是并列句时 , 第二个分句前的 that 不可省
注意：在 demand 、 order 、 suggest 、 decide 、 insist, desire, request, command 等表示要求、命令、建议、决定等意义的动词后，宾语从句常用“( should ) + 动词原形”。
2. 用 who ， whom, which, whose, what, when, where, why, how, whoever, whatever,whichever 等关联词引导的宾语从句相当于特殊疑问句，应注意句子语序要用陈述语序。
3. 用 whether 或 if 引导的宾语从句，其主语和谓语的顺序也不能颠倒，仍保持陈述句语序。
当主句动词是过去时态( could, would 除外)，从句则要用相应的过去时态，如一般过去时，过去进行时，过去将来时等;当从句表示的是客观真理，科学原理，自然现象，则从句仍用现在时态。
5. think, believe, imagine, suppose 等等动词引起的否定性宾语从句中，要把上述主句中的动词变为否定式。即将从句中的否定形式移到主句中。
1. That empty hole is like a mouth always needing to be fed.
2. I cheered up immediately … watching the earth become smaller.
3. We watched, amazed as the fire broke out on the outside of the spaceship.
4. This disappearance made possible the rise of mammals on the earth.
This produced a chain reaction, which made it possible for life to develop.
5. …. The earth may become too hot to live on.
6. They are putting too much carbon dioxide into the atmosphere, which prevent heat from escaping the earth into space.
7. So whether life will continue on the earth for the millions of year to come will depend on whether this problem can be solved.
1. get away from 逃离
2. watch / look out 注意，当心
3. go for a hike / go hiking 去徒步旅游
4. as with 正如……一样
5. see off 为某人送行
6. on the other hand 在另一方面
7. take care of 照顾
8. get close / near to 接近，凑近
9. tree after tree 一棵又一棵的树
10. as wall as 也，和……一样(好)
11. protect…from 保护……不受……的伤害
12. be surprised at 因……而吃惊
13. be caught / trapped / struck in 被……困住
14. take place 发生
15. go through 通过，经过