九年級下冊Unit 4 Natural disasters導學案

eg:  daming was hurt. the doctor said he had to stay in hospital for about two weeks. his
father has to go to take care of him.
 we don’t have to go to school on sundays. 星期天我們不必上學。
（3）must的否定為mustnt， 多表示“禁令”。
eg：no!you mustnt turn left! you must turn right into the strand.   不！你不能向左轉！你應該向右轉進入到strand中。
由must引起的疑問句，肯定回答要用must或have to，否定回答要用needn’t或don’t have to，意思是“不必”； 此用法在中考中的單選題中容易出現！
eg: 1）—must i finish my homework before eight o’clock? 我必須要在8點之前完成作業嗎?
—yes, you must.   是的，必須。  
2）—must i attend the meeting? 我必須要參加這次會議嗎？
—no, you needn’t/don’t have to. you can ask tom to go instead.  不，你不必。你可以讓湯姆替你去。
7、i tried to call my dad, but the line was dead.  我試圖給我爸爸打電話，但是電話線路不通。
  （1）try to do sth. 意為“試圖/努力做某事”，側重盡力，為了達到目的而努力；否定形式為try not to do sth.
i’m trying to learn english well.
  （2）try doing sth. 意為“試著/嘗試做某事”，只是一種新的嘗試，不一定付出很大的努力。
let’s try knocking at the back door.
【拓展】
   1）try one’s best to do sth. 意為“盡某人最大努力做某事”
we should try our best to practice speaking english.
   2）try on 意為“試穿”
can i try in on?
   3）try 作可數名詞，意為“嘗試”，常構成have a try，意為“試一試”
i can’t open the door. will i have a try?
8、it’s impossible to stick with it.   堅持工作很重要。
  （1）it’s +形容詞+ for sb. + to do sth. 意為“對某人來說做某事時……的”
       it’s +形容詞+of sb. +to do sth. 意為“某人做某事是…..的“，此句式中的形容詞是描述人的性格、品質的，如：polite, nice, kind, good, friendly等。此句式也可以改為sb. +be +形容詞+ to do sth.
  eg: it’s hard for me to answer your questions.
     it was foolish of him to go alone. = he was foolish to go alone.
  （2）stick with 意為“持續；堅持；不放棄”；還可以表示“緊接；不離開；和……呆在一起”
  eg: stick with your schedule for the week.
     stick with them. there’s safety in numbers.
9、my friends replied,” i have no time to drink about the flood…”  我的朋友說：“我沒有時間考慮洪水…..”
辨析：reply與answer
（1）兩者均可表示“回答”，但 answer 屬常用詞，多用于一般性應答，而 reply 則較正式，多指經過考慮而作出答復。
eg: i was so nervous that i couldn’t answer [reply].   我緊張得沒作回答。