2.Tobehonest,IdoubtwhetherImmakinganydifferencetotheseboyslivesatall.(教材P38)说实话，我怀疑我是否能改变这些孩子的生活。【剖析】句中doubt用作动词，意为“怀疑；不相信”。在肯定句中doubt后面的从句由whether/if引导。【典例】 ①(2021·全国甲卷)Itsstillalittletoocoldforthemtogooutintotheopen,butassoonastheweatherwarmsup,Ihavenodoubtthatthelittleonewillbeoutandaboutexploringandplayingeveryday.天气还是有点冷，不适合他们到户外去，但一旦天气暖和起来，我相信这个小家伙会出去，每天探索和玩耍。 ②ThereisnodoubtthatitisveryimportanttomindyourtablemannersinChina.毫无疑问，在中国注意餐桌礼仪非常重要。 ③Theyalldoubtwhether/ifanyagreementcanbereachedatthemeeting.他们都怀疑会上是否能达成协议。 【注意】 Thereis(some)doubt之后常接whether引导的从句，表示“怀疑是否会……”；Thereisnodoubt后常接that引导的从句，表示“对……毫不怀疑”。 【即学即用】单句语法填空thatwhether (1)Thereisnodoubt________moreandmorepeopleprefershoppingonlinenowadays. (2)Thereissomedoubt________hewillpassthefinalexam. 完成句子，每空一词 (3)如果处理正确，毫无疑问，回收利用将节省能源与原材料并减少对环境的污染。 Ifdoneright,______________________________________recyclingwillsaveenergyandrawmaterialsandreducepollutiontotheenvironment.thereisnodoubtthatIdontdoubtthat(4)我毫不怀疑我的女儿会有光明的未来。________________________________mydaughterwillhaveabrightfuture.Ihavenodoubtthat ＝________________________________________mydaughterwillhaveabrightfuture.【句型升级】按要求完成句子1.我怀疑他们是否能够成功到达公园，于是我主动提出帮助他们。(用doubtwhether...翻译句子)________________________________________________________________Idoubtedwhethertheycouldmakeittothepark,soIofferedtohelpthem. 2.我已经养成了读英文报的习惯，因为它丰富了我枯燥的校园生活。(since引导原因状语从句) IhavedevelopedahabitofreadingtheEnglishnewspaper,_____________________________________. 3.Assoonashegotthere,thejudgebeganhiswork.(改写句子，每空一词)sinceitenrichedmyboringcampuslife_______________________hegotthere,thejudgebeganhiswork.Themoment/minute4.Youdonthavetoworrytoomuchaboutit.(用Thereisnonee