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C.saving moneyD.losing weight【答案】B 【解析】【分析】句意:一一你姨晚餐只吃一塊面包?一一是的,為了減肥,她只吃一點(diǎn)。她看上去比以前苗條了。根據(jù)語境可以推測(cè)出吃得少的目的是為了減肥。A、C錯(cuò)。用不定式作目的狀語,故選B。14.We advise parents _____ their children at home alone in order to keep them away from danger.A.not leaveB.not to leaveC.leaveD.to leave【答案】 B 【解析】【分析】句意:為了使孩子遠(yuǎn)離危險(xiǎn),我們建議父母不要單獨(dú)把孩子留在家里。advise sb to do sth建議某人做某事,動(dòng)詞不定式的否定形式就是在to前面加not故advise sb not to do sth建議某人不要做某事。結(jié)合句意,故選B15.The policeman warned the man after drinking. A.not to driveB.to driveC.driving【答案】 A 【解析】【分析】句意:警察警告那個(gè)男人不要酒后駕駛。warn sb not to do sth,警告某人不要做某事,故選A。 【點(diǎn)評(píng)】考查不定式,注意warn sb not to do的用法。16.The boy _______ in the teachers39。 office was found _______ at the school gate yesterday.A.standing, smokingB.standing, to smokeC.stood, smokingD.stood, to smoke【答案】 B 【解析】【分析】句意;站在老師辦公室的這個(gè)男孩,昨天被發(fā)現(xiàn)在校門口吸煙?,F(xiàn)在分詞作定語表示正在進(jìn)行的伴隨性動(dòng)作,和被修飾詞是主謂關(guān)系。Find后接不帶to的不定式做賓語補(bǔ)足語,但是當(dāng)變?yōu)楸粍?dòng)語態(tài)后,不定式符號(hào)to要加上,故選B?!军c(diǎn)評(píng)】非謂語動(dòng)詞的用法比較固定,區(qū)別的主要辦法一是和被修飾詞的關(guān)系。一般現(xiàn)在分詞和被修飾詞是主謂關(guān)系,過去分詞和被修飾詞是動(dòng)賓關(guān)系。二是表示動(dòng)作狀態(tài)的不同,現(xiàn)在分詞表示正在進(jìn)行的伴隨性動(dòng)作,過去分詞表示發(fā)生過的被動(dòng)的動(dòng)作,不定式表示具體的將要進(jìn)行的動(dòng)作。掌握這兩點(diǎn),基本就能完成此類問題。17.Attention, please! Without permission, children are not allowed alone here. A.to swimB.swimmingC.swimD.swam【答案】 A 【解析】【分析】句意:請(qǐng)注意!未經(jīng)允許,孩子們不能單獨(dú)在這里游泳。swim代詞,游泳;to swim不定式形式;swam過去式。固定搭配allow sb. to do ,動(dòng)詞不定式作賓補(bǔ);本句為此結(jié)構(gòu)的被動(dòng)形式be allowed to do sth被允許做某事。故選A。 【點(diǎn)評(píng)】此題考查固定短語be allowed to do。18.—What should I do, doctor? —_____ healthy, you should do more exercise.A.KeepB.KeepingC.To keepD.To be kept【答案】 A 【解析】【分析】句意:——我應(yīng)該做什么,醫(yī)生?——為了保持健康,你應(yīng)該多鍛煉。keep healthy,保持健康,固定搭配,排除D。多鍛煉的目的是保持健康,所以用to do不定式表目的,故選C。【點(diǎn)評(píng)】考查to do不定式表目的,注意平時(shí)識(shí)記其用法,理解句意。19.The teachers often tell us ________ in the river. It39。s dangerous. A.not swim1