情态动词:can与could的用法详解 一、表示能力 (1) 表示现在的能力，用can： my sister can drive. Could modal verb (request) a2 used as a more polite form of can when asking someone to provide something or do something （礼貌地请 … At this point, labor could be one or two days, or even weeks, away, with your cervix continuing to open gradually over that time. 我妹妹会开车。 everyone here can speak english.
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情态动词:can与could的用法详解 一、表示能力 (1) 表示现在的能力，用can： my sister can drive. Could modal verb (request) a2 used as a more polite form of can when asking someone to...
