when：表示一件事在某一時間發生，例I came home when 7o'clock.（我七點回家。）；while：表示一件事發生時另一件事也在發生，I came home while she was watching TV.（我回家時她正在看電視。）；among：在三者(或三者以上)中，區別於between(兩者中)；as soon as：一......就......Please call me as soon as you arrive at home.(請一到家就給我打電話。)。
when：表示一件事在某一時間發生，例I came home when 7o'clock.（我七點回家。）；while：表示一件事發生時另一件事也在發生，I came home while she was watching TV.（我回家時她正在看電視。）；among：在三者(或三者以上)中，區別於between(兩者中)；as soon as：一......就......Please call me as soon as you arrive at home.(請一到家就給我打電話。)。
1、Have a great influence on ~~~ （對……有很大的影響）
例句：Smoking has a great influence on our health.
抽菸對我們的健康有很大的影響。
2、An advantage of ~~~ is that + 句子 （……的優點是……）
例句：An advantage of using the solar energy is that it won't create（produce） any pollution.
使用太陽能的優點是它不會製造任何汙染。
3、The reason why + 句子 ~~~ is that + 句子 （……的原因是……）
例句：The reason why we have to grow trees is that they can provide us with fresh air.
The reason why we have to grow trees is that they can supply fresh air for us.
我們必須種樹的原因是它們能供應我們新鮮的空氣。
1、Our school is a beautiful campus, as long as you walk into the campus, you will find the campus everywhere is full of green school every corner of the green trees, colorful flowers.
At the school gate in the flower beds, with a vibrant cycas, its branches and leaves like a giant comb, it is very naughty, just use it to comb my hair, comb will head wall.
Our classroom before and after the trees are green.A tall plane trees, thick leaves, trees under open flowers like a lamp; Are sending out the scent of camphor tree, all the year round bamboo have a tall and handsome. Whenever the breeze blowing, leaves, bamboo leaf outside the window vibrate, sasha vujacic ring was born, as if to say hello to my teachers and classmates. After class the students some play under the tree, some quietly rest under the tree and reading a book. We breathed the fresh air, fresh, very happy. There are so many green plants in our school. Jasmine on corridor, the playground of sunflower, even on the wall of a studio, also covered with green ivy. They are some high, some short,a variety of shapes and colors. While there are some I called out their names, but they are very lovely, is they brought fresh air to the students, they are to keep out sunshine, wind and rain, the students make us learn happily.
This is our campus，everywhere is full of green，we should take good care of it well，let the green never retreat.
2、我們的學校是一個美麗的校園，只要你走進校園，就會發現校園裡到處都充滿了綠色，學校每個角落都綠樹成陰，鳥語花香。
學校門口的花壇裡，長著一棵生機勃勃的鐵樹，它的枝葉像一把巨大的梳子，只不過它
很淘氣，用它梳頭，肯定會把頭梳得頭破血流。
我們教室的前後也都是綠色的樹木。有高大的梧桐樹，有葉子厚厚的，開起花來像燈炮
一樣玉蘭樹；有一年四季散發著香味的樟樹，有挺拔的俊秀的翠竹。每當微風吹過，樹葉、竹葉就在窗戶外顫動，發出沙沙的響生，彷彿在向老師和同學們問好。下課後同學們有的在樹下盡情玩耍，有的在樹下不聲不響的休息、看書。大家呼吸著新鮮空氣，精神飽滿，幸福極了。我們學校綠色的植物真是太多了。長廊上的迎春花，操場邊的太陽花，就連排練廳的牆上，也長滿綠色的爬山虎。它們有的高，有的矮，形狀各異，五彩繽紛。雖然有一些我叫不出它們的名字，但是它們都很可愛，是它們給同學們帶來了新鮮的空氣，是它們為同學們遮擋陽光、風雨，使我們愉快地學習。
這就是我們的校園，處處充滿了綠色，我們要好好地愛護它，讓這綠色永不退卻。