【正文】 ..的之一。”但用法有所不同。如，Shall I have a rest?should 應(yīng)該shouldn’t不應(yīng)該表義務(wù)語氣弱于must，通過是表達(dá)自己的觀點，認(rèn)為對方應(yīng)該做什么。need需要needn’t不需要表需求need除了是情態(tài)動詞外，還能作為實義動詞，意義不變，但用法不一樣。第一句中的need為情態(tài)動詞，符合情態(tài)動詞后面加動詞原形的用法，既need do sth；第二句中的need為實義動詞，既need to do sth；第三句中的need同樣為實義動詞，因為如果除去need，則此句中不存在任何可以作為謂語的成分，因此可判斷這里的need就是作為謂語動詞。因此，其中的名詞必須為復(fù)數(shù)。學(xué)習(xí)參考。It is much colder than yesterday. 今天比昨天冷得多。做時態(tài)的思路一般是在句中找到表示時間的關(guān)鍵詞或短語，通常為時間狀語或副詞。t B. mustn39。needn’t不需要can’t 不可能would愿意wouldn’t不愿意表示意愿常用語would like to do sth的句型中，表征求對方意見。其次，need的兩種用法屬較難掌握部分。讓我們一起通過下面的這個例子來體會一下：Have you been to the before?Yes, I have.When did you go there?When I was nine years old. 習(xí)題練習(xí)A.1. The old man______(be)ill for a long time and he________(stay) in bed for a week. His son________(decide) to send him to the hospital yesterday.2. I_______(write) to you last week. _______you________(receive) the letter yet?3. “_______the train_______(arrive) yet?” “Yes, and it_________(already leave). “ “What?! When _______it________(leave)?” “Half an hour ago!”4. ______ you______(see) Tom? Yes, I have. Where _______you________ (see) him? I______ (see) him reading a novel in the library.5. Something unusual ____ (happen) to you if you ____ (not be) careful.6. How long ______ your uncle______ (live) in Beijing?B.1. I will tell him as soon as he _____ backA. e B. es C. will e D. came your mother _____ some cleaning on Sundays?A. Does…does B. Do…does C. Does…do D. D