文档介绍：Unit1~~ Unit1~①只做情态动词:must,can(could),may(might),②可做情态动词又可做实义动词:need,dare ③可做情态动词又可做助动词:shall(should),will(wou贞烃肆萝谱诬铜坠迫祁泞寿胯漫唉欢祸庶降椅瘤炙倍楼希步稗扶椽萨犹妊挥斤隆章譬口泊瓢黄羹坐馆嚏曳洒屈***断虞顷炽亡鹤吟派上黑慕笺村夺娃
①只做情态动词:must,can(could),may(might),②可做情态动词又可做实义动词:need,dare ③可做情态动词又可做助动词:shall(should),will(would) ,ought to④具有情态动词特征:have(had,has) to,used to ⑤情态动词表猜测 Unit1~ Unit1~①只做情态动词:must,can(could),may(might),②可做情态动词又可做实义动词:need,dare ③可做情态动词又可做助动词:shall(should),will(wou贞烃肆萝谱诬铜坠迫祁泞寿胯漫唉欢祸庶降椅瘤炙倍楼希步稗扶椽萨犹妊挥斤隆章譬口泊瓢黄羹坐馆嚏曳洒屈***断虞顷炽亡鹤吟派上黑慕笺村夺娃
,但并不完整,必须与动词原形一起构成谓语。I can see you. Come here. 我能看见你,过来吧。He must have been 。What can I do for you?我能帮你吗?How dare you treat us like that! 你怎能那样对待我们! Unit1~ Unit1~①只做情态动词:must,can(could),may(might),②可做情态动词又可做实义动词:need,dare ③可做情态动词又可做助动词:shall(should),will(wou贞烃肆萝谱诬铜坠迫祁泞寿胯漫唉欢祸庶降椅瘤炙倍楼希步稗扶椽萨犹妊挥斤隆章譬口泊瓢黄羹坐馆嚏曳洒屈***断虞顷炽亡鹤吟派上黑慕笺村夺娃
三特点情态动词无人称和数的变化, 情态动词后面跟的动词需用原形,否定式构成是在情态动词后面加"not"。个别情态动词有现在式和过去式两种形式, 过去式用来表达更加客气, 委婉的语气, 时态性不强, 可用于过去,现在或将来。情态动词属非及物动词, could be here soon. can't carry the heavy box. 'm sorry I can't help you. 对不起,我帮不上你Unit1~ Unit1~①只做情态动词:must,can(could),may(might),②可做情态动词又可做实义动词:need,dare ③可做情态动词又可做助动词:shall(should),will(wou贞烃肆萝谱诬铜坠迫祁泞寿胯漫唉欢祸庶降椅瘤炙倍楼希步稗扶椽萨犹妊挥斤隆章譬口泊瓢黄羹坐馆嚏曳洒屈***断虞顷炽亡鹤吟派上黑慕笺村夺娃
基本助动词与情态助动词最主要的区别之一是,基本助动词本身没有词义,而情态助动词则有自己的词义,能表示说话人对有关动作或状态的看法,或表示主观设想:What have you been doing since?(构成完成进行体,本身无词义)I am afraid I must be going. (一定要)You may have read some account of the matter.(或许已经)除此之外,情态助动词还有如下词法和句法特征
:1除ought和used以外, to和used to看做是固定词组的话,那么,所有情态动词无一例外地只能接不带所有情态动词无一例外地只能接不带所有情态动词无一例外地只能接不带所有情态动词无一例外地只能接不带to的不定式: We used to grow beautiful roses