Module2 Developing and Developed Countries-grammar教案

step 1 presentationa.       look at the link words but and however in these sentences. then answer the questions.1)      the report shows that we are making progress but that we need to make greater efforts.2)      in the last ten years in china, 150 million people moved out of poverty. however, the challenges are still great.3)      more than 1 billion people in developing countries do not drink safe water. however, in other parts of the world, e.g. eastern europe, water is now mostly safe to drink.q1. does however mean the same as but?q2. which link word begins a sentence?q3. which link word can join two parts of a sentence?q4. which link word is followed by a comma?suggested answers:q1. yes.q2. howeverq3. butq4. howeverb.       look at the link words although and while in these sentences. and answer the questions.1)      norway is at the top of the list, while the united states is at number 7.2)      the uk is in the thirteenth position, while china is in the middle of the list.3)      although more than 80% of children in developing countries go to primary school, about 115 million children are not being educated.4)      although developed countries give some financial help, they need to give much more.q1. which sentences compare two facts?q2. which sentences can you rewrite using the word but?suggested answers:
q1. all of them. q2. all of them.step 2. explanation.a.       but and howeverbut 作為并列連詞，在意義上起轉折作用。 but 前后的兩個句子或短語在意義上形成鮮明對照。 but 用來連接兩個分句或兩個較長的短語時， but 前面一般要加逗號。例如：　　（ 1 ） he is old but strong. 他年紀雖大卻很強壯。　　（ 2 ） learning the guitar isn't difficult, but you will have to practise.　　     學彈吉他并不難，但是你得練習。　　（ 3 ） he tried， but could not do it. 他試過，但是干不了。　however 意為“可是，然而，盡管”，較 but 的意味弱，通常用作連接性狀語。其位置可以在句首，句末或插入句中。當其被用來對照兩個分句時，中間需要有一個逗號；當它被用作句子的插入語時，則前后應各有一個逗號。例如：　　（ 4 ） however，we need not do that now. 可是，我們現在不需要做那個。　　（ 5 ） he said it was so；he was mistaken，however. 他說是那樣的，然而他卻弄錯了。