知識講解及情態(tài)動詞用法(存儲版)
【正文】 事情的推測時， must 后面通常接系動詞 be 的原形或行為動詞的進(jìn)行式。 4) must 表示對過去某時正發(fā)生的事情的推測， must 后面要接不定式的完成進(jìn)行式。t be home yet. 如果湯姆五點才離開這兒，他此時一定還未到家。 表示對過去情況的推測。t 表示。 You ought to (should) have been more careful in this experiment. He ought not to have thrown the old clothes away.（事實上已扔了。d better put on my coat. She39。 Would you like some cake? 3）否定結(jié)構(gòu)中用 will，一般不用 would, won39。 should 與 you 連用，用來提出勸告。t 不必，不用。t。它們的疑問，否定形式應(yīng)予以注意： Do they have to pay their bill before the end of the month? She didn39。 1) 實義動詞： need （需要 , 要求） need + n. / to do sth 2) 情態(tài)動詞： need，只用原形 need 后加 do，否定形式為 need not。作為情態(tài)動詞，兩者都只能用于疑問句，否定句和條件句。t 答案 B. will 既可當(dāng)作情態(tài)動詞，表請求、建議、也可作為實義動詞表 意愿、意志、決心 ，本題表示決心，選 B。t 不應(yīng)該。t 答案 A。答語中 of course，表示肯定的語氣，允許某人做 某事時，用 can 和 may 來表達(dá)，不能用 could 或 might。 will 和 would 注意： 1） would like； Would like to do = want to 想要，為固定搭配。 had better表示 最好 had better 相當(dāng)于一個助動詞，它只有一種形式，它后面要跟動詞 原形。 Linda has gone to work, but her bicycle is still here. She must have gone by bus. 3) ought to have done sth, should have done sth 本應(yīng)該做某事，而事實上并沒有做。 5）推測的否定形式，疑問形式用 can39。 At this moment, our teacher must be correcting our exam papers. 這時，我們老師想必在批改試 卷。t leave here until five o39。 I didn39。t tell him about it. 你一定不要把這件事告訴他。 (客觀上需要做這件事 ) He said that they must work hard. 他說他們必須努力工作。只 是可能性比 may 小。 e. 表示成功地做了某事時，只能用 was/were able to， 不能用 could。 4） 情態(tài)動詞沒有非謂語形式，即沒有不定式，分詞，等形式。 There are 10 people in the office and eight of them are women. 辦公室里有 10 個人，其中八個是女士。例如： He lives on his own. I need some time on my own. 2. You must keep to the path. Keep to 的意思是 “沿著 …… 走； 使不離開； 留在某個位置 ”。例如： Come on—we’re going to be late if you don’t hurry! (快點 ) Your piano playing has really e on since I last heard you play. (有進(jìn)步 ) It’ll take at least two hours to do this! Oh, e on! I could do it in 20 minutes.(得啦！算了吧！ ) 5. On our first evening, the three o
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