Global warming Period 2 Language Study
1.check the homework exercises.
2.ask some students to talk about global warming.
step 2 reading and finding
get students to read through warming up，pre－reading，reading，comprehending and discovering useful words and expressions in learning about language to underline all the new words and useful expressions or collocations in these parts.read them aloud and copy them down in the exercise book.
step 3 practice for useful words and expressions
1.turn to page 28.go through the exercises in discovering useful words and expressions with students and make sure they know what to do.
2.give them several minutes to finish the exercises.they first do them individually，and then discuss and check them with their partners.
3.check the answers with the whole class and explain the problems they meet where necessary.
step 4 vocabulary study
ⅰ.簡單知識掃描
1.tend(p26)
【原句再現(xiàn)】
it means that more heat energy tends to be trapped in the atmosphere causing the global temperature to go up.
這意味著更多的熱量被困在大氣層中，從而引起全球溫度上升。
【觀察探究】
(1)we sometimes tend to think that the ocean bottom is made up of smooth plains.
我們往往誤以為海底由平坦的平原構(gòu)成。
(2)people under stress tend to express their full range of potential.
處于壓力下的人容易發(fā)揮自己全部的潛力。
(3)doctors and nurses tended(to)the injured.醫(yī)生和護(hù)士護(hù)理受傷的人。
【歸納總結(jié)】
tend vi.& vt.意思是“往往會，趨于，傾向；照料，護(hù)理”。作“照料，護(hù)理”講時，常與介詞to搭配。
【即景活用】
(1)救護(hù)車上的救護(hù)人員在照料受傷的工人。
ambulance crews ______ the injured workers.
(2)男孩往往比女孩個子高。
boys ______ taller than girls.
suggested answers：(1)were tending(to) (2)tend to be
2.range(p27)
【原句再現(xiàn)】
...it will encourage a greater range of animals—all of which will make life for human beings better.
這將促進(jìn)動物的生長——所有這一切都會使人類的生活變得更好。
【觀察探究】
(1)maybe the question is beyond the range of human understanding.
或許這個問題超越了人類理解的范圍。
(2)you can see a range of mountains standing on the top of the tower.
站在塔頂你可以看到一系列山脈。
(3)the temperature ranges between ten and thirty degrees.
氣溫在十至三十度之間。
(4)i ranged the books on the shelf by/according to size.
我把書依大小順序排在書架上。
【歸納總結(jié)】
range n. 意思是“范圍；射程；山脈；行列”； v. 意思是“變化；排列；歸類于”，常用于range from...to...結(jié)構(gòu)，意為“從……到……范圍內(nèi)變化”。
【即景活用】
有年齡從七歲到十四歲的兩百個男孩。
there are two hundred boys ______________.
suggested answer：ranging from seven to fourteen in age