v1.0可編寫(xiě)可改正祈使句（一）觀點(diǎn)：用來(lái)表示懇求、命令、囑咐、邀請(qǐng)、勸說(shuō)的句子是祈使句。（二）一般祈使句（省略第二人稱(chēng)主語(yǔ)you）必定句：動(dòng)詞原形+Bebrave.Standup.Stoptalking!Comeonandjoinus!a.有時(shí)，為了增強(qiáng)語(yǔ)氣，能夠在動(dòng)詞以前加do.Dostudyhard.Dositdown.b.為了使語(yǔ)氣顯得客氣，可在祈使句的句首或句尾加上please.Please在句尾時(shí)，以前必定要加一個(gè)逗號(hào)。Pleasecomehere.Gothisway,please.祈使句有喚語(yǔ)，必定要用逗號(hào)分開(kāi)，放在句首或句尾。LiMing,comehere.Hereyouare,Eric.否認(rèn)句：Don’t+動(dòng)詞原形+Don’tswimintheriver.1111/4v1.0可編寫(xiě)可改正Don’tbelate.Pleasedon’tbenoisy.Don’ttellher,please.（三）Let祈使句（含有第一、三人稱(chēng)主語(yǔ)）1.必定句：Letsb.dosth.Let’sgoswimmingonSunday.Letmetryagain.LetTomgotherehimself.Letthenewsbeknown.Leteachmandecideforhimself.否認(rèn)句：’tletherwastetime.Don’tlethimhearyousaythat.Lethernotdoitalone.Let’snotsayanythingaboutDon’tletthemplaywithfire.注意：Let’s表示包含對(duì)方。

或Don’tletsb.dosth.it.Letus表示不包含對(duì)方。Let’sgo,shallwe（包含對(duì)方）Letusgo,willyou（懇求對(duì)方許，不包含對(duì)方）2222/4v1.0可編寫(xiě)可改正（四）句型變換：祈使句+and/or+陳說(shuō)句祈使句相當(dāng)于if指引的條件狀語(yǔ)從句。Useyourhead,andyouwillfindaway.Ifyouuseyourhead,youwillfindaway.Workhard,oryouwillfail.=Ifyoudon’tworkhard,youwillfail.練習(xí)：Comeearly,andyouwillcatchthefirstbus.=Comeearly,oryouwillmissthefirstbus.=連詞：1、and,then,andthen就，那么2、or,orelse,otherwise不然，要不然比較：1、Comeearlyandyouwillcatchthefirstbus.早點(diǎn)來(lái)，你就能追上第一班車(chē)。2、Comeearly,oryouwillmissthefirstbus.早點(diǎn)來(lái)，不然趕不上第一班車(chē)了。3、Useyourhead,thenyouwillfindaway.開(kāi)動(dòng)腦筋，那么你就能找到方法。4、Useyourhead,oresle,youwon'tfindaway.開(kāi)動(dòng)3333/4v1.0可編寫(xiě)可改正腦筋，不然你就找不到方法。5、Workhard,andthenyouwo