表原因的句型： 　　1Thereasonwhy.isthat. 　　2Onemaythinkofthechangeasaresultof. 　　3Thisbringsouttheimportantfactthat. 　　4Thereareseveralcausesforthissignificantgrowth 　　表结论的句型： 　　1Thereisnodoubtthatattentionmustbepaidto. 　　2Obviously/Apparently,ifwewantto.,itisnecessary... 　　3Fromwhathasbeendiscussedabove,wecandrewtheconclusionthat. 　　书信类英语作文常用句型怎么写 　　A 　　(1)Myappreciationtoyouforyourgeneroushelpisbeyondwords. 　　(2)WordsfailmewhenIwanttoexpressmysinceregratitudetoyou. 　　(3)Itakethisopportunitytoshowmyheartfeltappreciationforthekindassistanceyourenderedme. 　　B期待回信 　　(1)Iamlookingforwardtoyourreply/hearingfromyousoon 　　(2)Ilookforwardtoafavorablereplyatyourearliestconvenience. 　　(3)Yourpromptattentiontomyinquirywouldbehighlyappreciated. 　　C客套语【=听-力——课_^堂^_网汇总书信类英语作文常用句型】：一.问候 　　Ihaven’tseenyouforsuchalongtime.Howareyougettingalongwithyourwork二.祝贺 　　Iwanttocongratulateyouwithallmyheart.Iwarmlycongratulateyouonwhatyou’veachieved. 　　三.致谢 　　Iammostgratefultoyouforyourhelp.Iwanttothankyouheartilyforwhatyouhavedone. 　　四.询问 　　Iwonderifyoucouldtellmewhattodo.I’dbemostgratefulifIcouldhaveyourfullsupport.Pleasecouldyouletmeknowsomethingaboutit. 　　五.邀请 　　Isthereanychanceofyourcomingtohavedinnerwithusatourhome?Wearewonderingifyoucouldcometohavedinnerwithusatourhome. 　　六.接受邀请 　　I’mdelightedtoacceptyourinvitation.Thanksforyourinvitation.I’mcertainlylookingforwardtojoiningyou.Ihaven’theardfromyouforages.Howareyoudoing? 　　七.拒绝邀请 　　I’msincerelysorrythatwecan’tjoinyourdinnerparty.Iregrettosay“no”toyourinvitation.Thankyouforyourinvitationbutunfortunately… 　　八.抱歉 　　Idoapologizeforhavingkeptyouwaiting.I’mawfullysorryforgivingyousomuchtrouble. 　　九.同情 　　I’mmorethansorrytohearofyourillness.Ican’ttellyouhowsadIfeltwhenIheardof… 　　十.安慰 　　Itwasagreatshocktohear…Ijustcan’ttellyouhowsaddenedIam…