Module2 Period 4教案
Function, Grammar Teaching Objectives:
1.To know about the sentence structures about giving advice; 2.To know the usage of the imperatives; 3.To learn the meaning of traffic signs. Teaching procedures: Step1. Revision
Check the answers to theVocabularyExercises in the Workbook. Step2. Function
1. Ask Ss to read the sentences in Activity 1 on page 13 and summarize the ways ofgiving advice.
You should do … Make sure you do … It’s a good idea to do …
类似表达还有：You had better do … Why not do …? Why don’t you do …? Let’s do … What about…? How about…? Shall I / we do…?
1 / 4
2.Ask Ss to write some advice to their classmates about learning English. For your reference:
You should work hard at English.
Why don’t you buy some English tapes and some books togo with them if you wantto improve your listening skills?
Lt’s a good idea to listen to English songs if you want to improve your listening skill.You had better join in the English Corner and speak English as often as
possible.Why not look for a foreign pen friend if you want to improve your writing?
Make sure you listen to English and speak it every day. Let’s read the English novel together. …
Step 3. Grammar
1.AskSstofinishActivity1onpage16toletthemknowabouttheusageoftheimperatives.
2. Present Ss the grammatical rules of the imperatives.
(1)用于表达命令、请求、劝告、警告、禁止等的句子叫做祈使句，祈使句最常用于表达命令。祈使句因对象（即主语）是第二人称，所以通常都省略。祈使句的动词都为大凡现在时，句末则使用句号来表示结束。如：
Go and wash your hands.（去洗手。——命令）
Be quiet, please.（Please be quiet.）（请安静。——请求）
Be kind to our sister.（对姊妹要和善。——劝告）Watch your steps.（走路小心。——警告）
Look out！Danger！（小心！危险！—剧烈警告）Keep off the grass.（勿践草坪。——禁止）
2 / 4
祈使句也常把主语“You”表达出来，使对方听起来觉得温柔些，如：You go and tell him, Chris.（克立斯你去告诉他。）
(2)表现形式 ◆肯定结构:
①Do型(即:动词原形(+宾语)+其它成分)。如: Please have a seat here.请这边坐。
有的祈使句在意思明确的情况下,动词可省略。如: This way, please. = Go this way, please.请这边走。 ②Be型(即:Be +表语(名词或形容词)+其它成分)。如: Be a good boy!要做一个好孩子!
③Let型(即:Let +宾语+动词原形+其它成分)。如: Let me help you.让我来帮你。 ◆否定结构:
①Do型和Be型的否定式都是在句首加don’t构成。如: Don’t forget me!不要忘记我!
②Let型的否定式有两种:“Don’t+let+宾语+动词原形+其它成分”和“Let +宾语+ not +动词原形+其它成分”。如:
Don’t let him go. / Let him not go.别让他走。 ③有些可用no开头,用来表示禁止性的祈使句。如: No smoking!禁止吸烟!No fishing!禁止钓鱼！ ④用“let”的祈使句时，必须注意下列几点：
3 / 4
(a)“let”的否定句有二。如果宾语是第三人称用“Don’tlet...”；如果宾语是第一人称，则用“Let... not”，如：
Don’t let this type of things happen again.
(b)“Let“只适用于现在时态，可以有被动语态(the passive voice)，如：Let the recalcitrant criminals be sent to prison.
(c)“Let”后头除了是不带“to“的不定式动词(The infinitive without “to”)之外，还可以是某些合适的副词，如out, in, down, alone等：
Open the windows and let the fresh air in.
(d)用“Let’s”时，把谈话者的对象包括在内；用“Let us”时，并不包括对方，如：
Let us do it by ourselves, will you? Step 6. Homework
1. Ask Ss to reviewGrammarrules.
2. Ask Ss to finish Grammar exercises in the Workbook on page 73.
4 / 4
外研版高中英语必修四 Module2 Period 4教案-新版
