第13讲 情态动词和虚拟语气 精讲精练2022届准高三高考英语语法暑假专练

第13讲 情态动词和虚拟语气 精讲精练2022届准高三高考英语语法暑假专练 考点一情态动词 情态动词主要用来表示说话人的看法、态度等。情态动词本身虽有一定的意义，但它必须和动词一起构成谓语。情态动词没有人称和数的变化（但have to除外），后接动词原形。常用的情态动词有：can,could,may,might ,must,have to,will shall,should, need等。 一 表能力 (1) 一般能力用can或be able to都可, 均有过去时的变化。 (2) was / were able to除表示过去的能力以外还可以表示过去设法做成某一具体动作。 A blind man can not / is not able to judge colours . He could / was able to swim like a fish when he was young . The fire spread through the hotel very quickly but everyone was able to survive .. 二 表推测 ⑴ may /might语气最弱, 多用于（肯，否）定句 ⑵can/ could 语气肯定，多用于（？/否/！）句中 ⑶must表示强烈的肯定,①+动词原形（现在）②+ have done(过去)③+be doing(正在) 只用于肯定句 Some people who don’t like to talk much are not necessarily shy；they may just be quiet people. —I don’t really like James. Why did you invite him? — Don’t worry. He might not come. He said he wasn’t certain what his plans were. Look, someone is coming . Who can it be ? You can’t be hungry already — you had lunch only two hours ago. — Hi, Tom. Any idea where Jane is? —She m