come and look 不是固定短语。
只要语义逻辑没有问题,come 可以和许多不同的动词组成复合谓语用在句子中。由于动词 come 的词义特点,come and ...... 常见于祈使句型,即招呼对方过来做某件事。虽然形式上是并列动词(用连词 and),但是语义上所表达的动作是有先后秩序的。因此,将第二个动词以不定式形式与 come 用在一起也可以。几个常见的例子:
Come and look! (= Come to look!)
Come and eat! (= Come to eat!)
Come and learn! (= Come to learn!)
Come and join us! (= Come to join us!)
Come and practice! (= Come to practice!)
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