知識(shí)講解及情態(tài)動(dòng)詞用法-wenkub
2022-11-30 22:00:23 本頁(yè)面
【正文】 on. 他很快就能告訴你消息了。 3） 情態(tài)動(dòng)詞沒(méi)有人稱(chēng)，數(shù)的變化，即情態(tài)動(dòng)詞第三人稱(chēng)單數(shù)不加 s。例如： When the crops fail, the people go hungry. I always go red when I’m embarrassed. We’d better eat these apples before they go bad. every time 在句中引導(dǎo)一個(gè)狀語(yǔ)從句，表示 “每次 ……, 每當(dāng) ……” 。這八個(gè)人都知道，只有精誠(chéng)合作，他們才能按時(shí)完成任務(wù)。例如： Come on—we’re going to be late if you don’t hurry! (快點(diǎn) ) 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 of us were tired after walking for about eight hours. 在本句中， the 用在數(shù)詞前，表示特指。 On one’s own 意思是 “單獨(dú) ”。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(kāi)； 留在某個(gè)位置 ”。 the three of us 指的是 “我們?nèi)齻€(gè)人 ”（一共就三個(gè)人）。 There are 10 people in the office and eight of them are women. 辦公室里有 10 個(gè)人，其中八個(gè)是女士。例如： Every time I go and see him, he’s always working in the room. 8. The first rule of camping is to keep a clean camp site. 這個(gè)句子中不定式作表語(yǔ)，又如： To save water is to save our lives. 9. You can’t leave anything which bears might think is food. 這里 which bears might think is food 是一個(gè)定語(yǔ)從句，修飾 anything。 4） 情態(tài)動(dòng)詞沒(méi)有非謂語(yǔ)形式，即沒(méi)有不定式，分詞，等形式。 2）只用 be able to a. 位于助動(dòng)詞后。 e. 表示成功地做了某事時(shí)，只能用 was/were able to， 不能用 could。 He couldn39。只 是可能性比 may 小。 比較 have to 和 must 1) 兩詞 都是 39。 (客觀上需要做這件事 ) He said that they must work hard. 他說(shuō)他們必須努力工作。t have to 表示 不必 mustn39。t tell him about it. 你一定不要把這件事告訴他。（對(duì)現(xiàn)在情況的推測(cè)判斷） He must be working in his office. 他一定在辦公室工作呢。 I didn39。t you answer my phone call? Well, I must have been sleeping, so I didn39。t leave here until five o39。 表示對(duì)現(xiàn)在或?qū)?lái)的情況的推測(cè)，此時(shí)動(dòng)詞通常為系動(dòng)詞。 At this moment, our teacher must be correcting our exam papers. 這時(shí)，我們老師想必在批改試 卷。 The road is wet. It must have rained last night. 地是濕的，昨天晚上一定下雨了。 5）推測(cè)的否定形式，疑問(wèn)形式用 can39。t have found his car, for
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