高中2019屆英語語法專題講義 冠詞
c. are uncovering d. have uncovered 23--29.i think it is necessary for my 19-year-old son to have his own mobile phone, for i sometimes want to make sure if he home for dinner. （遼寧） a. come b. comes c. has come d. will come 24--31.it is said that the early european playing-cards for entertainment and education. （遼寧）a. were being designed b. have designedc. have been designed d. were designed第八講 情態(tài)動詞
【要點(diǎn)點(diǎn)撥】1. 表示請求和允許: can, could , may, might. 過去式使語氣更委婉，答語應(yīng)用原形。 --- could i use your computer tomorrow morning?--- yes, you can.( 否定回答可用：no, i’m afraid not.)2.表示推測：理論可能性can可能性肯定句must, may ,might, could疑問句can否定句can’t (不可能)，may not (可能不)1)can表示理論上的可能性，指某事或情況可能發(fā)生，但并不說明實(shí)際上真的發(fā)生. children can be very tiring. 2)對現(xiàn)在事情的推測： 情態(tài)動詞+do對過去事情的推測： 情態(tài)動詞+have done對已完成事情的推測：情態(tài)動詞+have done3)反意問句： he may know the plan, doesn’t he?you must have studied english before, haven’t you?you can’ t have been caught in the rain last night, were you?3.can & be able to
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