need用法.pptx

need needneed双重身份双重身份情态动词情态动词实义动词实义动词need 情态动词情态动词1.He neednt call me now.2.We neednt go to school on Sunday.3.Need I help you?4.Need she do the work at once?5.-Must I go right now?-No,you neednt.否定句疑问句1.need+动词原形动词原形2.无人称和时态的变化无人称和时态的变化 3.用于否定句及疑问句中用于否定句及疑问句中 4.用于否定回答用于否定回答must的提问的提问 用法用法1：need 实义动词实义动词1.We needed to help him relax.2.You dont need to tell him the news.3.The boy needs to water the plantd4.Jane didnt need to help Kangkang.eds1.need to do(肯定句肯定句)2.有人称和时态的变化有人称和时态的变化 3.否定形式要用助动词。否定形式要用助动词。用法用法2：need 实义动词实义动词21.I need to clean the classroom.2.The classroom needs cleaning.=The classroom needs to be cleaned.sb.need to do sth.need doing1.sb need+to do(某人某人)需要做某事需要做某事2.sth need doing =sth need to be done (某事某事)需要被做需要被做 用法用法3：sth.need to be done可兼做行为动词的情态动词可兼做行为动词的情态动词:need情态动词情态动词（+动词原形）动词原形）行为动词行为动词need1.无人称，时态和数的变化；多用于肯定句；need to do sth否定需要借助助动词need to be done=need doing表示被动2.否定句、疑问句中；3.常以neednt的形式出现；回答must的提问。Practice1.-Must I stay at home this afternoon?-No,you .A.dont B.neednt C.dont need2.Tom get up earlier tomorrow.A.needs to B.need C.need to3.Look!Your shirt is dirty.It .A.need washing B.need to wash C.needs washing4.We go to school on Sunday.A.need B neednt to C.neednt BACCSummary need情态动词情态动词（+动词原形）动词原形）行为动词行为动词2.否定句、疑问句中；3.常以neednt的形式出现；回答must的提问。1.无人称，时态和数的变化；多用于肯定句；need to do sth否定需要借助助动词need to be done=need doing表示被动Thank you!