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UNIT3EnglishAroundtheWorldTOPIC3CouldyougiveussomeadviceonhowtolearnEnglishwellSectionB--祈使句祈使句•祈使句,无主语,只用动词就可以.•表示请求或命令,加上please表客气。•如果变成否定句，Don’t开头是规律。•Notalking!是警示，祈使句用法要牢记。祈使句的结构如下：(Please)+dosth.(Please)+Don’tdosth.肯定：否定：祈使句的句型：Bequiet.Pleasehaveaseat.David,payattention.Don’tbeafraid.Pleasedonotmakeanoise.Alan,don’tbelate.1.动词+…2.Please+动词…3.人名+动词…肯定否定在动词前面加don’t否定重点句型Please...Let'spractice!Pleaseturnoffthefan.Pleasecleanthefans.Pleaseturnoffthelight.Pleasesitdown.Pleasestandup.Don’tmakenoiseatnight.Don’ttalkloudlyinclass.Don’tspeakwithmouthfull.Don’teattoomanycandies.