(could), may (might), must, have to, shall (should, will (would), dare (dared), need (needed), ought to 等。 情态动词无人称和数的变化;不能单独使用,必须与其后的动词原形构成谓语 一、 can, could 1) 表示能力(体力、知识、技能)。 Can you lift this h...
时间:2024-12-06 10:13栏目:行业资料