T: Boys and girls, we’ve known about changes in the world. Now let’s learn the changes
between the words.
(教师事先准备两组卡片，一组上面写有单词，另一组上面写有与单词相对应的前缀或后缀，把两组卡片分别按顺序排好，组合卡片，学习派生构词法。) Example:
T: What does this word mean?(出示卡片like。) Ss: 喜欢。
T: Right. Look at the change, please!(出示卡片dis，并与like 拼在一起。) Ss: Dislike. It means“不喜欢”. T: Good.
(教师用同样的方式呈现一些派生词，板书并让学生观察，师生共同总结词根加上前缀或后缀及词性的变化。) 如：
(1)否定前缀：un-, im-, dis-, in-等。
happy-unhappy, polite-impolite, agree-disagree, direct-indirect (2)re-前缀表示“重复”。 write-rewrite
(3)动词+-er表示“人”。 read-reader, write-writer
(4)动词+-ion/-ment/-ness变成名词。 act-action, treat-treatment, ill-illness (5)名+-y变成形容词。 cloud-cloudy, sun-sunny
(6)名词/动词+-ful变成形容词。 care-careful, hope-hopeful (7)形容词+-ly变成副词。 sad-sadly, strong-strongly
2. (根据派生构词法学习，板书并领读，要求学生掌握加下划线的单词。)
cover→discover direct→indirect possible→impossible excite→exciting fair→unfair invent→invention (引导学生用派生法去掌握更多的词汇。) 3. (做游戏，巩固派生构词法，完成3。)
T: Some homeless people are short of food, clothes, houses, and so on. Some words are short of “hats” or “shoes”. Let’s help the words in 3 wear “hats” or “shoes”. Then the words will have some other meanings. (这里hat意为“前缀”，shoe意为“后缀”，用穿“靴”戴“帽”的游戏完成3。) T: You can finish it in groups. Some words have more than one hat or one pair of shoes. For example: use—useful—useless—reuse write—writer—rewrite—writing Ss: The words are very interesting.
T: Yes. In this way, you can memorize many words in a short time. (教师布置一项课后作业，激发学生兴趣。)
教师把准备好的词展示在小黑板或幻灯片上，让学生讨论，利用派生构词法，组合出新词。 1. T: If you are interested in it, let’s have a discussion and try to make the words, such as: like and
dislike, comfortable and uncomfortable. obey write friendly luck polite west rapid home care able agree recent tell success win happy excite collect hope humor ill like suggest your develop change crowd clever fog health possible use noise labor bright enjoy beauty danger comfortable visit snow peace build twenty T: Finish these derivations. You can do them in groups.
(教师用上节课给单词穿“鞋”戴“帽”的小游戏复习派生构词法。) T: Let’s play a game to review the derivations. T: Who can put on “hat” for “obey”? S1: I can. dis + obey = disobey. T: Who can put on “shoes” for “home”? S2: I can. home + less = homeless. T: Who can put on “hat” and “shoes” for “friend”? S3: I can. un + friend + ly = unfriendly. …
3. (引出合成构词法，导入新课。)
T: Boys and girls, do you think English words are very interesting? Ss: Yes.
T: We can form new words by adding prefixes or suffixes to the words. Now let’s learn another
word formation: compound.
首先利用单词卡引导学生学习合成构词法，完成3。然后用多媒体呈现图片，讨论我们应该怎样帮助无家可归的人，培养学生的同情心，让学生学会关心他人，并在师生对话中学习1a中的生词及短语。
1. (教师出示一些单词卡，引导学生说出合成词的词义。)
T: As we know, “A friend in need is a friend indeed.” English words also have their own
friends. Now let’s help them find good friends.
T: Who can help them find friends? What’s the meaning when they are together? “home” and
“town”?(同时出示单词卡。) Ss: Hometown. It means “家乡”.
T: “Hand” and “bag” are good friends. Ss: Handbag. It means “手提包”.
(用同样的方式引导学生学习3中的生词。)
Ss: “Grand”and “daughter”are good friends. Its meaning is“孙女”，“外孙女”. Ss: “Grand” and “child”are good friends. It means“(外)孙或孙女”，“孙辈”. Ss: “Down” and “stairs” are good friends. Its meaning is“楼下”. Ss: “Fire” and “place” are good friends. It means“壁炉”. …
(板书生词，要求学生掌握。)
granddaughter, grandchild, headache, fireplace, downstairs, blackboard T: You’re very helpful. We should often help each other. In English, there are many words like these. It’s useful for us to make our vocabulary bigger. Let’s try to give more examples. Please do it in groups.
(用小黑板或幻灯片出示3，引导学生分组讨论，2分钟后，让各组汇报讨论结果。对表现最佳、说出合成词最多的小组给予表扬。) T: English words are very interesting, right? Ss: Yes. They’re very interesting.
T: We can make many new words by word formation. Look at the two cards. Let’s make a new word.(教师出示写有词根home和后缀less的卡片。) T: What does the word mean?
Ss: Homeless. It means “无家可归的”.
T: Yes. Let’s look at some pictures and talk about how to help homeless people. 1. (分组开展竞赛，复习合成词。)
T: Now, let’s have a word competition.
(把全班分成四组，让学生组内讨论，尽可能多地找出已学过的合成词，每组选择一人到黑板上写出本组总结的合成词，其他同学可以补充，写的最多的组获胜。)
G1 hometown birthday classmate handbag filmmaker … G2 pancake toothbrush daytime raincoat policeman policewoman … G3 homework housework outstanding farmland motherland … G4 classroom upstairs policeman toothbrush handsome … (三分钟后，宣布结果。)
T: Very good. Let’s count the words they wrote together. Ss:G1 twenty-one G2… G3… G4… T: You’re excellent. Which group is the winner? Ss:G2.
T: Let’s explain these words and read them. You can learn a lot of words from this competition. (解释这些合成词，让学生齐读，把不懂的写在笔记本上。)
T: Here are many word cards. Let’s put two of them together to make a new word. Examples:
S1: I have “friend”. S2: I have “ship”.
S1 and S2: It’s “friendship”. S3: I have “happy”. S4: I have “un”.
S3 and S4: It’s “unhappy”. …
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