高一英语必修高一英语必修 3 3 第第 2 2 单元导学案情态单元导学案情态 动词（动词（IIII）www.5ykj.com 导学案 4 情态动词（II）一、oughtto应该，应当其否定“oughtnotto”或“oughtntto”用于第一人称，表有责任或有必要做某事。weoughttobemorecarefulwithourhomework.用于二、三人称，表建议或劝告。yououghttofollowyourteachersadvice.Sheoughtnottogoalone.oughtto+havedone:本该Imsorry.Ioughttohavetoldyouthismorning.对不起，我本该今天早上告诉你的。二、haveto/donthaveto/mustnthaveto=havegotto必须，不得不（有人称和数、时态的变化）Hehastoworkonthefarmallday.他不得不在农场工作一整天。（2）donthaveto不必youdonthavetobuyacomputer.mustnt禁止，不许youmustntsleepinclass!三、need 需要，必要（既可以作情态动词，也可以作实义动词，但用法不同）（1）作为情态动词，need 通常用于否定句和疑问句youneedntbuythebook.Needhedohishomeworkfirst?yes,hemust!need 作为实义动词时，通常用法是：sb/sthneedtodoweneedtotellhimthetruth.sb/sthneeddoing/tobedone（表被动）mycarneedsrepairing./mycarneedstoberepairdsbneedsth某人需要maryneedsyourhelp.三、情态动词+havedone.musthavedone推测过去“肯定”Hemusthaveplayedcomputergameslastnight.2may/mighthavedone 推测过去“也许”Hemighthaveknowntheanswertothequestion.3.couldhavedone 用于疑问句时，表示推测过去“可能？”couldhehavefinishedthetask?他可能把任务完成了吗？（2）couldhavedone 用于肯定句时，表“能够做而没有做”Icouldhavefinishedtheworkonmyown.我本能够独自完成工作.4.shouldhavedone 本应该做而没有做youshouldhavestudiedhard.shouldnthavedone 本不该做而做了youshouldnthavetoldlies.5.oughttohavedone:本该做而没做6.neednthavedone本不必本没必要youneednthavetoldmethenews.www.5ykj.comwww.5ykj.com 导学案 4 情态动词（II）一、oughtto应该，应当其否定“oughtnotto”或“oughtntto”用于第一人称，表有责任或有必要做某事。weoughttobemorecarefulwithourhomework.用于二、三人称，表建议或劝告。yououghttofollowyourteachersadvice.Sheoughtnottogoalone.oughtto+havedone:本该Imsorry.Ioughttohavetoldyouthismorning.对不起，我本该今天早上告诉你的。二、haveto/donthaveto/mustnthaveto=havegotto必须，不得不（有人称和数、时态的变化）Hehastoworkonthefarmallday.他不得不在农场工作一整天。（2）donthaveto不必youdonthavetobuyacomputer.mustnt禁止，不许youmustntsleepinclass!三、need 需要，必要（既可以作情态动词，也可以作实义动词，但用法不同）（1）作为情态动词，need 通常用于否定句和疑问句youneedntbuythebook.Needhedohishomeworkfirst?yes,hemust!need 作为实义动词时，通常用法是：sb/sthneedtodoweneedtotellhimthetruth.sb/sthneeddoing/tobedone（表被动）mycarneedsrepairing./mycarneedstoberepairdsbneedsth某人需要maryneedsyourhelp.三、情态动词+havedone.musthavedone推测过去“肯定”Hemusthaveplayedcomputergameslastnight.2may/mighthavedone 推测过去“也许”Hemighthaveknowntheanswertothequestion.3.couldhavedone 用于疑问句时，表示推测过去“可能？”couldhehavefinishedthetask?他可能把任务完成了吗？（2）couldhavedone 用于肯定句时，表“能够做而没有做”Icouldhavefinishedtheworkonmyown.我本能够独自完成工作.4.shouldhavedone 本应该做而没有做youshouldhavestudiedhard.shouldnthavedone 本不该做而做了youshouldnthavetoldlies.5.oughttohavedone:本该做而没做6.neednthavedone本不必本没必要youneednthavetoldmethenews.www.5ykj.comwww.5ykj.com 导学案 4 情态动词（II）一、oughtto应该，应当其否定“oughtnotto”或“oughtntto”用于第一人称，表有责任或有必要做某事。weoughttobemorecarefulwithourhomework.用于二、三人称，表建议或劝告。yououghttofollowyourteachersadvice.Sheoughtnottogoalone.oughtto+havedone:本该Imsorry.Ioughttohavetoldyouthismorning.对不起，我本该今天早上告诉你的。二、haveto/donthaveto/mustnthaveto=havegotto必须，不得不（有人称和数、时态的变化）Hehastoworkonthefarmallday.他不得不在农场工作一整天。（2）donthaveto不必youdonthavetobuyacomputer.mustnt禁止，不许youmustntsleepinclass!三、need 需要，必要（既可以作情态动词，也可以作实义动词，但用法不同）（1）作为情态动词，need 通常用于否定句和疑问句youneedntbuythebook.Needhedohishomeworkfirst?yes,hemust!need 作为实义动词时，通常用法是：sb/sthneedtodoweneedtotellhimthetruth.sb/sthneeddoing/tobedone（表被动）mycarneedsrepairing./mycarneedstoberepairdsbneedsth某人需要maryneedsyourhelp.三、情态动词+havedone.musthavedone推测过去“肯定”Hemusthaveplayedcomputergameslastnight.2may/mighthavedone 推测过去“也许”Hemighthaveknowntheanswertothequestion.3.couldhavedone 用于疑问句时，表示推测过去“可能？”couldhehavefinishedthetask?他可能把任务完成了吗？（2）couldhavedone 用于肯定句时，表“能够做而没有做”Icouldhavefinishedtheworkonmyown.我本能够独自完成工作.4.shouldhavedone 本应该做而没有做youshouldhavestudiedhard.shouldnthavedone 本不该做而做了youshouldnthavetoldlies.5.oughttohavedone:本该做而没做6.neednthavedone本不必本没必要youneednthavetoldmethenews.www.5ykj.com