高中英语人教版 (新课标)必修3&4Unit 1 Festivals around the world教课课件ppt
展开①表示说话人对某一动作或状态的语气或情绪;②不可单独做谓语,必须和动原连用,否定+nt;③无人称、数的变化。
表示能力。I can speak English.She can lift her husband up with ne hand.
Tips: 如果表示过去某人有能力做某事,而且做成了某事,要用were/was able t = succeeded in.而culd一般只表示过去有能力做, 但做了与否未知。
The fire spread thrugh the htel very quickly but everyne ____ get ut.can B. culd C. was able t D. were able t
表示请求(request)The kid: ‘‘Can/culd I watch TV fr a while?”Tips:此时culd 不是过去式,而是表示委婉语气。表示许可(permissin) 。The mther: “Yu can watch TV fr 5 minutes.”表示惊讶,怀疑或不相信,主要用于否定句, 疑问句, 感叹句。(dubt)Hw can yu d such a thing? Can the wman be his wife ?can 可表示一时或偶尔的可能性。She had a bad temper(脾气),but she can be gentle(温柔) smetimes.It is warm in March in my hmetwn, but smetimes it can be very cld.
Tips:此时句中一定有表示一时或偶尔的时间状语。
may, might
表示请求(request)What award did yu get frm the sprts cmpetitin?May I have a lk?表许可(permissin)Yu may leave hme.She said yu might watch TV .
Tips:在一般疑问中,can/culd/may/might都可表示请求,但给予许可只可用can/may。
—Can/culd/may/might I watch Happy Camp?
—Yes, yu can/may.
may 表示现实的可能性(pssibility)Jane may be a millinaire smeday. Our ftball team didn’t play very well tday, but we might d better tmrrw.may 可表示祝福,祝愿May yu succeed! May Gd be with yu! May happiness and health always fllw yu.
句型:May+主语+动原!
May yur dream cme true.
表示:必须,一定 否定:mustn’tYu mustn’t speak ill f thers behind his back .
Tips:在回答must的一般疑问时,肯定时,用must;否定时,如想表达‘不必’之意,用needn’t/dn’t have t。
—Must I clean the dishes nw?
—Yes, yu must. /N, yu needn’t. /yu dn’t have t.
表示一个人的固执坚持,偏偏,一定, 非得Why must yu sing at night?Must yu g t the film when yu are ne?
用于一,三人称的疑问句中,表示说话者征求对方的意见或请求指示Shall we g ut fr lunch? Shall he cme in r wait utside?When shall he leave the hspital?用于二,三人称的陈述句中,表示说话人强烈的感情色彩,如: 命令,警告,允诺等Everyne shall wear unifrm.If yu dn’t wrk hard, yu shall fail in exam. He shall get half f the cmpany accrding t the will(遗嘱).
用在条约、规定、法令等文件中表示义务或规定,意为“应该,必须”。N persn shall carry a mbile phne int the examinatin rm during the Cllege Entrance Examinatin.
表示义务、责任(应该,应当)Yu shuld d as the teacher says. 用于一些表示感情的从句中,意为“竟然”I’m surprised that he shuld have been cheated by a 3-year-ld by.
will, wuld
用在第二人称疑问句中,征求意见Will yu drink sme milk tea?Wuld yu drink sme milk tea? 表示更加委婉的语气,更加客气表示主语的意愿、决心,即:主语自愿做某事 = 愿意I will cme up and help yu in a mment.- Will yu lend me a hand?I’d lve t. /Yes, I will.will 可表示现在的经常性的动作或行为,译为 “常常,就会”;wuld可表示过去的经常性的动作或行为,译为“过去常常”。Eg. If nbdy is at hme, we will have dinner utside. We wuld enjy a cup f cffee after wrk when we wrked in WS.
能力;请求;许可;理论或逻辑上的可能性;一时或偶尔的可能性(smetimes, at times)
请求;许可;现实的可能性;祝福,祝愿;may/might as well d…(还是…的好,不妨) ;may well d… (很可能做…)
用于一,三人称的疑问句中,表示说话者征求对方的意见或请求指示;用于二,三人称的陈述句中,表示说话人强烈的感情色彩,如:警告,威胁,允诺,规定等
必须,一定是(否定:mustn’t, needn’t/dn’t have t, can’t);偏偏,非得,一定 ( Why must yu sing at night? )
第二人称疑问句中,征求意见(wuld更加委婉);主语的意愿、决心,自愿做某事;will 常常、就会;wuld 过去常常
must 表示判推时,意为:一定、必定, 只用于肯定句 Eg. The light in her rm is still n; she must be at hme nw. can 表示判推时,只用于否、疑问中(can’t),是比较肯定的否定,意为:不可能, 可能…吗? Eg. She can’t be at hme. I saw her leave hme ten minutes ag. She frgt t turn ff the light.culd 表示判推时,意为:可能、也许, 可用于各种句式,此时,culd不是表示过去,而是一种不肯定的语气。 Eg. Xia Shenyang culd be frm Lianing Prvince. Where culd he be frm?
may, might 表示判推时,均为:可能、也许,此时,might不表示过去,而表示可能性比may小,更无把握。
Tips: a. 在表示判推时,must的否定式为:can’t/culdn’t, 疑问句时使用can/culd
b. 在表示判推时, can’t/culdn’t = 不可能 may nt/ might nt = 可能不
eg. He must be a student. He may be a student. He can’t be a student. He may nt be a student.
c. 在肯中,culd/may/might 都可表示可能
shuld/ ught t 在表示判推时,均意为:应该、应当,是按照常理推断,具有一定的依据,语气比must弱—When can I cme fr the pht? I need it tmrrw.—It ____ be ready by 12:00.A. shuld B. must C. may D.might
MV + have + dne
shuld/ught t + have dne过去本应做某事,但并没有做否定:shuld nt/ught nt t + have dneEg. Yu shuld/ ught t have been kind t yur husband.你不应该与你老公打架的.Yu shuldn’t/ught nt t have fught with yur husband.
must have dne 过去一定做过或完成过某事,只用于肯定句中。 Yu must have heard f Xiashenyang’s English name. He must have been mad last night.can’t have dne 只用于否定、疑问句中,表示不可能做过某事 must have dne 的否定形式 The mn can’t have been full last night. He can’t have finished his hmewrk tday.
culd have dne 可用于各种句式在否、疑中: culdn’t have dne = can’t have dne在肯中,有两种含义:a.过去可能做过或完成某事: He culd have been mad.b. 本能够做某事,但没做,有时含有委婉批评 He culd have married the girl he wanted t. Yu culd have asked me fr help.
may have dne 表示过去可能做过或者可能已经完成了某事,只用于肯定句、否定句中:Yu may have heard f Xuriyanggang.Yu may nt have heard f Xuriyanggang.needn’t have dne 表示过去本来没必要做,但做了,译为“本不必要”didn’t need t d 表示过去没必要做,也没做We needn’t have learnt s much English grammar.We didn’t need t learn s much English grammar.
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