情态动词都有哪些qiouqiou

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情态动词都有哪些qiouqiou

情态动词都有哪些qiouqiou
情态动词都有哪些
qiouqiou

情态动词都有哪些qiouqiou
情态动词有四类:
①只做情态动词:must,can(could),may(might),ought to
②可做情态动词又可做实义动词:need,dare
③可做情态动词又可做助动词:shall(should),will(would)
④具有情态动词特征:have(had,has) to,used to

can can't
do don't
would
should shouldn't

can could may might need(情态和实意都有) should must shall