they are sure that they must walk home.为什么要用that?

Amuggleconfrontsyouandsaysthattheyaresureyouareawitchorwizard.Doyou:/一个麻瓜向你对峙,说他确定你是个巫师,你会:Askwhatmakesthemthinkso/问他为什么这么认为Agree,andaskwhetherthey'dlikeafreesampleofajinx/同意,并问他要不要免费体验一下恶咒Agree,andwalkaway,leavingthemtowonderwhetheryouarebluffing/同意,然...

1. 由that引导的宾语从句。That只有语法作用，没有实在的意义，在口语和非正式文体中可以省略。例如：He said (that) he wanted to stay at home.She doesn’t know (that) she is seriously ill.I am sure (that) he will succeed.2. 由连接代词who, whom, whose, what, which和连接副词wh...

因为后面跟的内容不一样。be sure that后面加一句完整的句子。如：i'm sure that simon lives here.simon lives here.是完整的句子。be sure to do sth.如：they are sure to be late.be late 是一个动词而不是句子 be sure of+名词 如：we're sure of his innocence.be sure that=be c...

that即可代表事物也可代表人，which代表事物；它们在从句中作主语或宾语，that在从句中作宾语时常可省略关系词，which在从句中作宾语则不能省略。而且，如果which在从句中作“不及物动词＋介词”的介词的宾语，注意介词不要丢掉，而且介词总是放在关系代词which的前边，但有的则放在它原来的位置 2.which作...

are they sure that she will win?

/Somethingmustbedonetostopthefowlflufromspreadingout.(该采取措施防止禽流感蔓延。)(3)谓语动词切忌用“行为动词1+原形动词”、“be+原形动词”。记住使用下列正确形式:①情态动词+原形动词。如:You’dbettergooverthelesson.(你最好复习这一课。)②shall/will/would+原形动词。如:Theyshouldhavebeenthereonce.(...

Ifmorethanonepersonplanstodriveyourrentalvehicle,makesurethattheyarenamedasadditionaldriversontherentalagreement.Providedthatanyadditionaldriversarenamedontherentalagreementthentheywillalsobeprotectedagainstanyexcesschargesassocaitedwithlossordamagewhentheywereresponsibleforthevehicle.Ourpoliciesprovidecoverautomaticallyfor...

they are sure/certain to come.他们一定会来的。3.两者都能用于“be sure/certain +从句”句型中，表示“确信……”，主语只能是人，而不能是物。如：tom is sure/certain that i put the key on the table.汤姆确信我把钥匙放在桌子上了。we are sure/certain that the book will be of g...

这是一部以上世纪30年代美国经济大萧条为背景的影片！内容很让人感动，感觉打在他身上的每一拳同时也打在了我的身上！影片始终贯穿着一个主题，那就是每个人心中都要有坚定的信念和追求的目标！有了信念和目标一切困难都可以克服！也让每个人都明白，你并不仅仅是为了自己而活着！同时他也反映了亲情是...

22.We___thelastbusanddidn’thaveanymoneyfortaxi,sowehadtowalkhome.A.reachedB.lostC.missedD.caught23.Seetheflagsontopofthebuilding?Thatwas___wedidthismorning.A.whenB.whichC.whereD.What24.There’snolighton-they___beathome.A.can’tB.mustn’tC.needn’tD.shouldn’t25.-Excuseme,canyoutell...