B.情态动词除ought to, used to等外,后面只接不带to的不定式。 1.情态动词+do You shouldn't be so careless. 你不该这样粗心大意。 Jessica told him yesterday she might not go on the trip. 杰西卡昨天告诉他,她可能不去旅行了。 Difficulties can and must be overcome. 困难能够而且必须克服。
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