嘉兴英语教学网www
jxenglish
com收集整理欢迎使用第四章情态动词(一)情态动词表示说话人对动作或状态的各种观点和态度,如需要、猜测、意愿或怀疑等
情态动词有词义,但不完全,是所谓的“辅助性”动词,在句中不能单独充当谓语
一、情态动词的特征和形式A
情态动词的各种形式见下表:情态动词maymightcancouldmusthavetooughttowillwouldshallshouldneeddareusedto否定式maynotmightnotcannot/cannotcouldnotmustnotdonothavetooughtnottowillnotwouldnotshallnotshouldnotneednotdarenotusednottodidnotuseto简略否定式mayn't(老式英语,现在不常见)mightn'tcan'tcouldn'tmustn'tdon'thavetooughtn'tto(否定句中to可省略)won'twouldn'tshan't(只用于英国英语)shouldn'tneedn'tdaren'tusedn'ttodidn'tusetoB.情态动词除oughtto,usedto等外,后面只接不带to的不定式
1.情态动词+doYoushouldn'tbesocareless
你不该这样粗心大意
Jessicatoldhimyesterdayshemightnotgoonthetrip
杰西卡昨天告诉他,她可能不去旅行了
Difficultiescanandmustbeovercome
困难能够而且必须克服
2.情态动词+bedoingShemustbelisteni