各位好,想请问一个问题
He keeps practicing _______(play) baseball every day.
大家普遍都知道keep后面接动名词, 所以practice要改动名词Ving
但下一个动词该如何解释也是要改playing呢?
谢谢大家

practice + doing (sth)，因此 practice playing baseball句型规定如此，字典和 usage 的书都直接列出，没写解释。

虽然字的用法如楼上所说，但是大家会这样写句子吗？我会直接把play这个动词省略，当然如果这是考题就没办法了

答案是 He keeps practicing playing baseball every day. 因为你要让 keeps 后面接的仍然是一个 noun phrase (在这里是个 gerund phrase).举个更长一点的 noun phrase (把 keep 也串进去) 的例子:We're amazed at his keeping practicing playing baseball every day.