九年級英語It must belong to Carla教案
use up是“消耗，用盡”的意思。
we used up the money and could not go back home.
我們把錢用完了，回不了家了。
the ink has been used up. 墨水用完了。
五、語法：情態動詞表示推測
情態動詞可以表示說話的語氣。本單元主要學習情態動詞表示推測的用法。
請先讀下面四組對話：
1. —whose notebook is this?
—it must be ning’s. it has her name on it.
2. —whose french book is this?
—it could be ali’s. she studies french.
3. —whose guitar is this?
—it might belong to alice. she plays the guitar.
4. —whose t-shirt is this?
—it can’t be john’s. it’s much too small for him.
句中的情態動詞must, could, might和can’t分別表示不同程度的推測。現歸納如下：
must用于肯定句中，表示說話人對事物的推測把握最大，意思是“一定；準是”。 如：
(1) the photo must be mary’s. those are her parents.
(2) alice has been in china for several years. she must be a big girl now.
◎may / might / could這三個詞都可以表示說話人對事物的推測，但可能性較小，意思是“有可能；也許”。其中might / could比may較為委婉客氣和更加不肯定。如：
(1) my friend has lost his watch. this one may / might / could be his, but i’m not sure.
(2) —where is mom now?
—i’m not sure. she may / might / could be in the kitchen.
◎can表示推測主要用于否定句和疑問句。can’t表示有把握的否定推測，意思是“不可能”。 如：
(1) the hair band can’t be jack’s. he is a boy.
(2) —look! mr hu is on the other side of the street.
—it can’t be him. he has gone to beijing.
◎must / may / could / might + be + doing sth. 表示“一定 / 可能正在做某事”，can’t / may not / could not / might not + be + doing sth.表示“一定不 / 不可能正在做某事”。must / may / could / might + have done sth.表示對過去或已經完成的事情的推測。如：
(1) peter must / may / might be playing football on the playground.
(2) maria must / may / might have gone to the movie.
【熱身訓練】
1. —where is tom? he hasn’t come to school today.
—i think he _____be ill.
a. would b. can c. can’t d. might
2. —there is somebody at the door. who _____it be? is it the postman ?
—no, it ____ be him. it’s just seven o’clock. it’s too early.
a. can; can’t b. will; won’t c. may; mustn’t d. must; may not
3. have a glass of water, please. you be thirsty after running.