初中英語時(shí)態(tài)講解和練習(xí)[含答案解析]-文庫吧
2025-06-03 15:07 本頁面
【正文】 f ……should） .：Greater efforts to increase agricultural production must be made if food shortage ____________ avoided. A is to be B can be C will be D has been 答案是A. is to be。全句的意思是：“如果要避免食品短缺，就必須作出更大努力來增加農(nóng)業(yè)產(chǎn)量?！薄?216。 表預(yù)測時(shí)，我們可以用will 或be going to。但兩者還存在以下兩點(diǎn)區(qū)別： 1) 用be going to 特別是意指根據(jù)目前的明顯跡象來推斷某件事將要發(fā)生。 will則只是表明說話人認(rèn)為或相信某件事將要發(fā)生。 2) be going to 通常用來表示說話人與其所說的時(shí)間馬上或在相當(dāng)近的將來就要發(fā)生。而will所表示的動作發(fā)生的時(shí)間可近可遠(yuǎn)。 a. Look at those black clouds! It39。s going to rain. b. I feel terrible. I think I39。m going to be sick. c. John is going to fall into that hole! d. Oh, my dear! They39。re going to bump against that tree! e. You look very pale. I am sure you are going to get sick. 一般時(shí)態(tài)練習(xí)一、用動詞的適當(dāng)形式填空(素食者) (not, eat)meat. atheist(無神論者) (not, believe)in God. dripping(滴水) (wear)away a stone. (always, not, go)to school late. That is to say, he (sometimes, attend)school late. He (be, generally)a good student. He (be, always)ready to help others. it (rain)tomorrow, we39。ll have to put off our sports meet. !Here (e)your boyfriend! (write)more than 600 pieces of music. (be)very tired last night, so I (go)to bed early. 9. you (go)anywhere on Labor Day? I was young, I (want)to be a bus driver.答案：39。t eat39。t believe39。t always go, sometimes attends, is generally, is always,went,go4. 現(xiàn)在進(jìn)行時(shí)l 形式：be doing: am/is/are +doing.(是助動詞，沒有“是”的意思).l 意義：強(qiáng)調(diào)在現(xiàn)在這個(gè)時(shí)間點(diǎn)，某項(xiàng)活動正在發(fā)生。l 用法： A) 表示說話此刻正在進(jìn)行。 .: What program are you watching? I am studying English. B) 表示現(xiàn)階段正在持續(xù)的動作。這是進(jìn)行時(shí)態(tài)表示的是一個(gè)一般性的活動，在說話時(shí)刻這個(gè)動作并不一定正在發(fā)生。 .: These days I am translating a book. C) 表示最近的將來一定的安排。通常含有“計(jì)劃”、“安排做”之意。 .: I am taking a makeup test tomorrow. D) 現(xiàn)在進(jìn)行時(shí)常與always, forever, continually, constantly等連用，往往表示抱怨、厭煩、不合理或使人不愉快的事。 .: Jack is always borrowing money and forgetting to pay you back. Jack常常借錢忘還。 How e Joe is always groaning about things? Joe為什么總是在抱怨？5. 過去進(jìn)行時(shí)l 形式：be doing: was/were doingl 意義：強(qiáng)調(diào)在過去這個(gè)時(shí)間點(diǎn)，某項(xiàng)活動正在發(fā)生。l 用法： A) 用來描述一個(gè)過去特定的時(shí)刻正在發(fā)生的事情。 .: I was discussing my thesis with my director at this time last night.（特定時(shí)刻） B) 過去進(jìn)行時(shí)還常常和一般過去時(shí)配合使用。 此時(shí)，過去進(jìn)行時(shí)通常表示一個(gè)歷史較長的體現(xiàn)“背景”的動作或狀態(tài)；而一般過去時(shí)則表示此“背景”下發(fā)
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