初中英语题！急！

hadforgotten

tofinish

willrain/rains

isnot

What/do

If/are

Will/be

byselling

C

D

A

C

您需要讲解的是【if的用法】，以下就是：

(表示条件)如果,主句用将来时，if从句用现在时表示将来Hewillcomeifyouinvitehim.如果你请他,他会来的。2.(表示虚拟)假如,要是1）时态：可以表示过去，现在和将来的情况。它的基本特点是时态退后。a.同现在事实相反的假设。句型：条件从句主句一般过去时should(would)+动词原形Iftheywerehere,theywouldhelpyou.b.表示于过去事实相反的假设。句型：条件从句主句过去完成时should(would)have+过去分词Ifshehadworkedharder,shewouldhavesucceeded.Thericewouldnothavebeenburntifyouhadbeenmorecareful.IfmylawyerhadbeenherelastSaturday,hewouldhavepreventedmefromgoing.Ifhehadcomeyesterday,Ishould/wouldhavetoldhimaboutit.含义：Hedidnotcomeyesterday,soIdidnottellhimaboutit.Ifhehadnotbeenillandmissedmanyclasses,hewouldhavemadegreaterprogress.含义：Hewasillandmissedmanylessons,sohedidnotmakegreaterprogress.c.表示对将来的假想句型：条件从句主句一般过去时should+动词原形were+不定式would+动词原形should+动词原形Ifyousucceeded,everythingwouldbeallright.Ifyoushouldsucceed,everythingwouldbeallright.Ifyouweretosucceed,everythingwouldbeallright.3.是否=whether连接宾语从句Iwonderifsheisill.不知她是否病了。

如回答帮助您解决了问题，请选为满意答案，谢谢！