Unit 2 How often do you exercise? 導(dǎo)學(xué)案
例1：he is a teacher.(變否定句)he is not a teacher. 或he isn’t a teacher.
例2：they can dance.（變否定句）they can not dance.或they can’t dance.
例3：jim likes pets. (變否定句)jim does not like pets.或jim doesn’t like pets.注意：例3中l(wèi)ikes→like，即動詞由第三人稱單數(shù)形式打回為動詞原形。
二、將一個句子變?yōu)橐话阋蓡柧湟灿腥齻�步驟，且類似變否定句的規(guī)則。即：將找到的be動詞或情態(tài)動詞提到句首，末尾加問號，若沒有be動詞或情態(tài)動詞，同樣的方法借助do、does、did，并將其提到句首，動詞打回原形，末尾加問號。注意：遇到some變any，并根據(jù)語境更改相應(yīng)的人稱和物主代詞。請將例1、例2、例3變?yōu)橐话阋蓡柧洌?br>例1_______________________.例2__________________________.例3______________________.
三、特殊疑問句的變法：通常對劃線部分提問的過程就是變這個句子為特殊疑問句的過程。基本結(jié)構(gòu)：特殊疑問詞 + 一般疑問句原則上劃什么就用什么特殊疑問詞。例如：劃時間就用when，劃原因就用why，劃方式就用how，劃頻率就用how often。
例4：she exercises twice a week.(對劃線部分提問)
how often does she exercise?
特殊疑問詞 一般疑問句
練習(xí)：jim likes pets.(對劃線部分提問)_______ ________ jim like?
四、1、how many 后加＿＿＿＿＿＿ how much 后加________________
2、.my mother wants me to drink milk.
want to do sth. 意思是“想要做某事”；want sb. to do sth.意思是“想要某人做某事”。如：
do you want to go to the movies with me？你想和我一起去看電影嗎？
the teacher doesn't want us to eat hamburgers.老師不想讓我們吃漢堡包。
3、she says it’s good for my health.
（1）be good for...表示“對……有益（有好處）”;其反義為：be bad for...。（這里for 是介詞，后跟名詞、代詞或動名詞）如：it's good for us to do more reading. 多讀書對我們有好處。
reading in bed is bad for your eyes.在床上讀書對你的眼睛有害。
exercise is good for your health 鍛煉有益于健康
he is good for nothing 他這個人沒什么用。
【辨析】be good for; be good at; be good with; be good to
be good for...表示“對……有益（有好處）”;其反義為：be bad for...。
be good at…“擅長于。。。。。。”，相當(dāng)于do well in…
be good with (sb.)=get along well with sb.與(某人)相處得好
be good to（sb.）=be kind/friendly to sb.“對。。。。。。好”
4.health 不可數(shù)名詞, 健康（指人體或心理狀況），健康狀況。如： my health. .
doing sports is good for your health.， 常見短語 be in good(bad, poor) health意為健康，不健康 his father is in good health
【拓展】：healthy adj. 健康的。----反義詞：unhealthy. he is a healthy teenager.
i have a healthy lifestyle. 短語： keep/stay healthy 保持健康,be healthy/look healthy看上去很健康；healthily adv.健康地eat healthily健康飲食
【訓(xùn)練案】
一、單項選擇。
（ ）1、_____do you drink coffee? -----twice a day.