Unit 8 语法思维导图及专练-2023-2024学年九年级英语全一册基础知识专项讲练（人教版）

Unit 8 It must belong to Carla.（语法讲练） 【知识导图】 【要点拓展】 1.表示肯定的猜测时，must可能性最大，can/could次之，may/might最小。 2.表示否定的猜测时can't/couldn't语气最强，指“不可能”；may not/might not语气最弱，指“可能不”。 3.在反意疑问句中，当谓语动词含有must/might/can等表推测意义时，疑问部分的助动词应与情态动词后面的动词在非推测情况下的用法保持一致。 She must be a driver, isn't she?她一定是个司机，是吗？ It must have rained last night, didn't it?昨晚一定下雨了，是不是？ 3.在特定语境中，一些“情态动词+have done”具有一定感情色彩。 （1）ought to/should have done本该做，却未做； oughtn't to/shouldn't have done本不该做，却做了（含责备之意） 例：You shouldn't have done that, I had warned you of that several times.我已多次警告你，你本不该那么做的。 （2）might have done本可以做，却没做（表很委婉的责备） 例：You might have phoned me, though you were busy then.你再忙也该给我打个电话。 （3）could have done本可能，却没有 例：He could have cought the early bus, but he was delayed by helping a stranger.他本能够赶上早班车，但因为帮一个陌生人而晚点。 （4）would(not) have done本想做，却没做/本不想做，却做了 例：I would have helped you, but I was too busy.我本想帮你，可我太忙了。 【奇思巧计】 情态动词表推测，一般情况有两种 一是现在或将来，常有以下的三种 完全肯定用must, 完全否定用can't 不太确定用can/could/may/might 二是对过去的推测，常用情态+have+过分 过去推测常虚拟，使用时候要注意 【同步检测】 一、单项选择 1．—Whose jeans are these? —They ________ be John’s. They are much larger than his. A．might B．must C．can’t 2．—I think Mr Zhang may be in his office. —No, he ________ be there. I saw him ________ just now. A．needn’t; left B．mustn’t; leaving C．can’t; leave D．shouldn’t; left 3．—Sam, go to open the door, please. It ________ be your sister. —No, Dad. It ________ be her. She will be back after four o’clock. A．May; mustn’t B．must; can’t C．must; mustn’t 4．David ________ be at home, for no one answers the phone. A．must B．mustn’t C．can D．can’t 5．It ________ be Lingling’s book, but I’m not sure. Liu Hui likes reading, too. A．can’t B．must C．could 6．—There is someone knocking on the door. I wonder who it ________ be. —It ________ be Frank. He phoned to tell me he would come to our home soon. A．must; must B．could; must C．might; can’t D．might; mustn’t 7．— Where is Linda? — I’m not sure. She ________ in the school library. A．could be B．must be C．can’t be D．will be 8．—Maybe she is a t